1、一年級口算1000道20+5=64-32=87-72=98-44=88-8=48-29=62+26=2+94 二86-77=39-36=75+24=76+4 二51+27=8+91=24+43=82+13=13+74二89-53=74-55=45+13=80+18=6+67=1+18 二95-83=93-33=55+5=100-57=39-23=34+53=23-17=76-65=36+49=72+23=43+42=75-14二34-16=40-33=68+15=10+32=29+67=76+14二64-4=62+32=100-56=83-62=68-11=78-15=21+5=69-8=10

2、+15=50+16=65+9=17+43=13+55=33-9=58-8=93-38=91-37=59-54=29+30=73+23=78-57=4-1=44-28=95-26=68-44=84+1=27-14=57+19=71-17=3+67=89-42=39+9=9+5二54+46=8+10=90-29=22+38=52-11=83-31=50-19=74-68=58+16二12+7=18+56=27+70=53-4=49+25二79-32=24+49=23-10=66+34二20+26=45-43=21+35二5+91=34-13=65-23=48+7=47-6=27+34二100-28

3、=2+55=25+58二89-67=37+47=44-31=49+25二5+48 二42+2=59+3=97-7=96-43=48-7=1614二50+23=92-63=17+1=30+41=68+6=48-47=50+18=67+12二43+1=53+22=63+10=65-21=46-28=16+70=59-38=23+24=83-22=46-29=23-6=8+72=57-44=12+58=80-6=9+54 二94-25=99-45=68-6=51-49=20+55=7+5=59-5=32-1=23+41=2+75=81+18=92-83=74-49=95-75=24-3=39-13=

4、55-16=17+3=78+4 二81-2=72+10=70+26二26+50=69-29=49+25=39+45=80-61=83+7=5+91=45-35=29+24=72+7=25+58二48+27=60-29=21+55=66+34=61-55=15+77二29+68=80-70=60+6=2+61=50+20=1+35=29+71=12+17=86-38=16+71=51-33=68+20=92-58=31-20=94-39=47-29=11+87=71+25=41-11=86-73=91-73=13-4=97-38=97-34二44+5 二74-33=11+66二73+26=41+

5、34二33+25=9+57=94-54=20+20=39+55=97-62=2+81=65+24=43-27=44-37=43+53=4+20 二80-54=69+31=8+6二45+40=91-25=55-54=87-34二49+49=49+30二73-37=62-3=25+45=43-30=84-50=79-68=84-71=45+17二13+84二17+46=80-66=39+55=94-81=94-47=93-68=50-42=51-11=64-11=31+27=90+3=76-14=65-50=99-71=45+55=90-38=88-10=51-3=80-54=43+23=65+1

6、2=99-14二65-17=62+3=43+41=4+76 二43-27=63-24=20+33=20+53=39+55=56+14=92-49=75-6=43-30=81+1=19+76=9+23=73+15=19+10=98-86=52+28=68-52=96-41=65+2=37+47=68+15=25+10=80+1=61-48=10+34二100-89=84-10=7+36=91-20=61+9二57-19=33-15=45+17二9+16二75+13=61-25=25+75=4+35=66-45=52-5=35+27=12+2=21+25=27+68二41+39二16+68二27+

7、34二62-61=91-25=46-4=83-35=90-89=38-20=58-33=71-58=16+84=65-17=20+75=79-56=79+8=10+34=99-29=36+64二59+37=91-20=19+56=7+35=4+54 二25+75=33+55=34+8=68-9=38-20=35+46=59-36=57+15=41+39二34+13=59-27=94-34二35+27=59-13=67+19=90-33=90+9=99-22=20+16=27+45=76-65=98-63=64+17=50+11=27-12=49+31=37+55=94-20=65-17=91+

8、2=78+11=34+24=79+6 二92-40=17+43=95-75=23+28=86-26=98-92=39-15=83-35=54-46=81-9=30+12=8+81=69-3=16+43=54-5=34-18=74-70=58+13=45+36二59+5=79-68=92+3=16+7=67-64=45+21=63-39=31+28二84-74=11-6=65-39=48+51=58-47=23+36=62+12=51+25=31+4=84+3=57-46=14+12=31+4 二57+31=45+45=92-79=76-65=79-65=34+65=80-20=27-12=84

9、-38=72-4=38-15=79+6=87-31=41-21=55-39=29+54二60+22=35+53=20+22=46-41=50+9=60+16二33-3=90+9 二56-6=15-11=47-22=5+15 二68-57=90-5=69-36=58-47=96-90=81+2=10+3 二84-74=15+83=18+3=72-30=53+3 二81+14二71-69=33+30=90+5=47+34二50+36=72-6=83-35=99-65=27+71=8+23=67-64=32+65=82+6=89-51=65-4=19+12=55-21=20-6=8+81=48+18

10、=98-25=8+57=34-18=45-35=7+46=71-20=59+5=74+24二25+6=13+41=8716二93-13=7+61=18+28=23+28=95-14=68-55=81-25=8+31=57+5=15+42=23-9=84-74二50-24=32+14=61+27=46-41=68-26=12+76二28-22=29+54=42+49=69-30=92-2=5+15=67-56=20+59二47+22=34-18=86+12=55-15=2+73 二5+15=100-10=19+49二58+28=84-31=48-16=98-11=88+4=46-7=64-42=

11、31-3=90-5=93-21=39+28=9+2二21+37=82-50=14+13=58+29二100-58=59+5=17+59=54+25=28+48=82-27=28+34二35+35=42-27=84-53=21+37=60+6=100-7=33+41=66+30=29-14二37+45=75-63=98-96=48+7=66-63=51-25=38+38=80-33=79-55=67-64=2+45=23+64=82+15=5+15=16+21=58-46=4+20 二84-53=5+31=11+46二43-7=27+55=98-71=84-76=41+2=24+18=4+16二

12、63-5=88-10=6+7=25+73=57+35=69-11=17+28=75-29=68-25=52+43=19+72=32+49=59-35=14+42=61+29=14+3=2+3二77+9=9+82=76-57=28+28=55+21=34+50=27+69=48+16二28+53=82-35=65-17=70-47=83-76=78-16=52-1=27+39=19-15=25+72=1+81=76-58=83-40=14+38=90+6=61-3=50-19=53+33=51-27=89-56=89-10=64-61=12+52=87+3=56+9 二71-68=54+1=87

13、+5=89-70=83+13=43+32=2+48=22-10=83-82=22+62=91-57=44-32=8+91 二90-87=87+11=64-42=86-30=8+6 二83-23=8-3=32+18二99-41=77+9=76-12=37-32=78+2=96-31=25+8=9-5=20-8=65+21=17+40=65+25=41+39二89-88=74-33=47+35=79+8=36+22=92-66=93-8=91-11=58-12=61+25二56-1=42+20=92-36=80-2=35+20=65-59=33+58=100-44=14+14=32+64二48+1

14、3=39-4=71-58=96-38=57+13=89-54=33-17=18-1=24+53二91+1=48-25=43+33=100-71=79-35=74+15二100-64二33-30=65+34二56+16=3+49=14-1=76+22=41+2=88-32=25+29=96-27=46-9=38+35=57+41=75-15=67-30=54+31=60-4=95-52=20+1=12+54二85+6=88-47=19-17=36+17二8-3=41-8=24+42=45-35 =29 + 24 =11+82=72 + 7 =48 + 27 =60-29 =13 + 81=21

15、+ 55 =1 + 35 =31-20 =35 + 40=71+25 =94 25 =23 + 41 =54 + 2=20 + 55 =43+1 =68 + 6 =6 + 66=57-44 =97-7 =50 + 23 =6+14=83-22 =25 + 58 =49 + 25 =14+10=46-28 =47 6 =5 + 91 =30 + 6=66 + 34 =61-55 =15 + 77 =86-4=29 + 68 =60 + 6 =2 + 61 =19 + 60 二50 + 20 =29 + 71 =12+17 =56+12 二86-38 =51-33 =68 + 20 =9+1=92

16、-58 =94-39 =47-29 =75-4=11+87 =41 11 =86-73 =62 + 6=91-73 =97-38 =97-34 =22 + 78=44 + 5 =11+66 =73 + 26 =33-3=41+34 =9 + 57 =94-54 =67+16 二20 + 20 =97-62 =2 + 81 =11 + 75=65 + 24 =44-37 =43 + 53 =42 + 32=4 + 20 =69 + 31 =8 + 6 =2 + 66=45+40 =55-54 =87-34 =4 + 76=49+49 =73-37 =62 3 =91-5=25+45 =84-50

17、 =79-68 =51 + 23 二84-71 =13 + 84 =17 + 46 =76+16=80-66 =13-4 =39 + 55 =22 + 74=80-70 =16 + 71 =74-33 =17 + 21=33 + 25 =9+35=59+17=35-15=83+13=94-81 =94-47 =34 + 21 二93-68 =51-11 =64-11 =21 + 57=31+27 =76-14 =65-50 =20 + 2=99-71 =90-38 =88-10 =67-4=51-3 =43 + 23 =65+12 =11+48 二99-14 =62 + 3 =43+41 =4

18、8-9=4+76 =63-24 =20 + 33 =5+42=20 + 53 =56+14 =92-49 =30+16=75-6 =81 + 1 =19 + 76 =22+8=9 + 23 =19+10 =98-86 =17+13=52 + 28 =96-41 =65 + 2 =5 + 92=37+47 =25+10 =80+1 =72+10=61-48 =100-89 =84-10 =23+16 二7 + 36 =61 + 9 =57-19 =70 + 6=33-15 =9+16 =75+13 =1+7 二61-25 =4 + 35 =66-45 =24-7=52-5 =12 + 2 =21

19、+25 =89+10 二27 + 68 =16 + 68 =27 + 34 =12 + 55 二62-61 =46-4 =83-35 =38+40二90-89 =58-33 =71-58 =40+14=16 + 84 =50-42 =90 + 3 =15 + 20 二45 + 55 =73+15 =68-52 =51 + 10=68+15 =49 + 30 =43-30 =27 + 65二45 + 17 =43-27 =80-54 =36 + 51=91-25 =20 + 75 =79-56 =57+18 二79+8 =99-29 =36 + 64 =29 + 43=59 + 37 =19 +

20、 56 =7 + 35 =41+22 二4 + 54 =33 + 55 =34 + 8 =14 + 80=68-9 =35+46 =59-36 =68-7=57 + 15 =34+13=59-27 =69 + 9=94-34 =59-13 =67+19 =84-8=90-33 =99 22 =20+16 =57-5=27+45 =98-63 =64+17 =7 + 74=50+11 =49 + 31 =37 + 55 =22-4=94-20 =91+2 =78+11 =1+47=34 + 24 =9240 =17 + 43 =26 + 41=95-75 =86-26 =98-92 =78 +

21、9=39-15 =54 46 =81-9 =6+48=30+12 =69-3 =16+43 =58+8=54-5 =74-70 =58+13 =3 + 35=45 + 36 =79-68 =92 + 3 =24+ 30二16 + 7 =45 + 21 =63-39 =4 + 45 二31+28 =11 6 =65-39 =71 + 18 二48 + 51 =23 + 36 =62+12 =28 + 58=51+25 =23 + 28 =83-35 =47+46二8+81 =90 + 9 =27-12 =10+18=79 + 6 =25 + 75 =35 + 27 =47 + 26二41+39

22、=10 + 34 =65-17 =49 + 34=91-20 =84 + 3 =57-46 =56 + 5=14+12 =57 + 31 =45+45 =77 + 9=92-79 =79-65 =34 + 65 =20 + 7=80-20 =84-38 =72-4 =33+15=38-15 =87-31 =41-21 =31+28 二55-39 =60 + 22 =35 + 53 =42-1=20 + 22 =50 + 9 =60+16 =70-6=33-3 =56-6 =15-11 =39 + 20=47-22 =68-57 =90-5 =24 + 55二69-36 =96-90 =81 +

23、 2 =62 + 33=10 + 3 =15+83 =18 + 3 =59+ 24二72-30 =81 + 14 =71-69 =7 + 34=33 + 30 =47 + 34 =50 + 36 =76 + 23二72-6 =99-65 =27 + 71 =40+1=8 + 23 =32 + 65 =82 + 6 =35 + 28二89-51 =19+12 =55-21 =29-8=20-6 =48+18 =98-25 =49-6=8 + 57 =45-35 =7+46 =15 + 74=71-20 =74 + 24 =25 + 6 =56 + 26二13+41 =87-16 =65-4 =2

24、9 + 7=5+15 =93-13 =7 + 61 =33+19 二18 + 28 =4641 =53 + 3 =24 + 7=90 + 5 =58-47 =31+4 =30 + 20二29 + 54 =38-20 =76-65 =13 + 72=67-64 =95-14 =68-55 =18+11 二81-25 =57 + 5 =15+42 =57 + 39=23-9 =50-24 =32+14 =31+9 二61+27 =68-26 =12 + 76 =41 + 9 二28-22 =42+49 =69-30 =21-5=92-2 =67-56 =20 + 59 =57-7=47 + 22

25、=86+12 =55-15 =50+48二2 + 73 =100-10 =19+49 =51+4=58+28 =48-16 =98-11 =81 + 14 二88+4 =6442 =31-3 =9 + 71 二90-5 =39 + 28 =9 + 2 =40-9=21+37 =14+13 =58 + 29 =76+19=100-58 =17 + 59 =54 + 25 =6 + 57 二28+48 =28 + 34 =35 + 35 =38 + 32=42-27 =21+37 =60 + 6 =7 + 59=100-7 =66 + 30 =29-14 =10 + 62=37+45 =98-96

26、 =48 + 7 =51+2=66-63 =38 + 38 =80-33 =66 + 23=79-55 =33+41 =75-63 =9 + 74=51-25 =84-53 =84-31 =16 + 61=46 7 =82-50 =93-21 =72-2=82-27 =2+45 =23 + 64 =6 + 65=82 + 15 =16 + 21 =58-46 =11+6=4 + 20 =34-18 =59 + 5 =5 + 95 二84-74 =5 + 31 =11+46 =13 + 77 二43-7 =25 + 73 =57 + 35 =32 + 53=69-11 =75-29 =68-25

27、 =55-3=52+43 =32+49 =59-35 =53 + 26=14+42 =14 + 3 =2 + 3 =8 + 30=77+9 =76-57 =28 + 28 =20 + 55二55 + 21 =27 + 69 =48+16 =29 + 33二28 + 53 =65-17 =70-47 =39 + 59=83-76 =52-1 =27 + 39 =6+10=19-15 =1+81 =76-58 =67+12=83-40 =90 + 6 =61-3 =75+8=50-19 =51-27 =89-56 =71-7=89-10 =12 + 52 =87 + 3 =48+11 二56+9

28、=54+1 =87 + 5 =8 + 2=89-70 =43 + 32 =2+48 =35-2=22-10 =22 + 62 =91-57 =46 + 36=44-32 =90-87 =87+11 =5+46=64-42 =8 + 6 =83-23 =89-7=8 3 =14 + 38 =25 + 72 =15 + 23=78-16 =9 + 82 =61 + 29 =60 + 20=82-35 =19 + 72 =17 + 28 =72 + 6=8 + 31 =53 + 33 =64-61 =70+18=71-68 =32+18 =86-30 =40+12=8+91 =83-82 =34 +

29、 50 =18 + 54=24+18 =99-41 =77 + 9 =32 + 66=76-12 =78 + 2 =96-31 =57 + 39=25 + 8 =20-8 =65 + 21 =28-4=17+40 =65 + 25 =9 5 =30 + 64=37-32 =41+39 =89-88 =13-7=74-33 =79 + 8 =36 + 22 =25 + 67=92-66 =91-11 =58-12 =33+45=61+25 =42 + 20 =92-36 =48-9=80-2 =65-59 =33 + 58 =55 + 32=100-44 =32 + 64 =48+13 =39

30、+ 57=39-4 =96-38 =57+13 =61-9=89-54 =18-1 =24 + 53 =3 + 73 二91 + 1 =43 + 33 =100-71 =64-3=79-35 =100-64 =33-30 =75+4=65+34=3+49 =14-1 =79-6=76 + 22 =88-32 =25 + 29 =4 + 8=96-27 =38 + 35 =57+41 =13 + 36=75-15 =54+31 =60 4 =55 + 25二95-52 =12 + 54 =85 + 6 =42 + 9=88-47 =36+17 =8-3 =58 + 28=41-8 =9 + 35

31、 =59+17 =21+76=35-15 =27 + 55 =98-71 =74 + 5=84 76 =4+16 =63-5 =51+49=88-10 =47 + 35 =93-8 =44+44=56-1 =35 + 20 =6 + 7 =38+13=41+2 =83+13 =24+42 =13 + 67=19-17 =46-9 =67-30 =49+41 二20+1 =56+16 =74+15 =28 + 25二48-25 =33-17 =71-58 =21+74 二14+14 =11+9 =80-3 =27+40=95-4 =25 + 7 =62-2 =74+12=83 + 5 =56 +

32、 20 =64 + 6 =6 + 56=65 + 3 =32 + 6 =29-7 =65 + 29=35 + 2 =43 + 5 =87+10 =17 + 40 二39-3 =81-2 =60+8 =66+17=39+10 =48 9 =47-8 =2 + 97 二52-4 =40-2 =27-9 =59+17 二32-4 =50-8 =63-9 =11-6=37-8 =75-9 =92-3 =90-8=42-7 =47 8 =26-7 =45+12 二52-3 =80-2 =36-9 =12-4=78-4 =72-2 =45-9 =25 + 8=86-8 =40-2 =46-9 =6+82=

33、43-4 =35 + 5 =85 + 2 =2 + 55 二59-4 =64 + 6 =32 + 7 =14 + 6=49-5 =60-4 =11 + 20 =34 + 39=45 3 =25+4 =36-5 =24 + 52=84+4 =88-4 =76 + 0 =36 + 27=93-3 =56 + 20 =64 + 6 =17 + 60=65 + 3 =12 + 6 =29-7 =4 + 76=33 + 2 =23 + 5 =37+1 =51+31 二29-3 =18-2 =30 + 8 =13 + 25 二43+1 =23 + 7 =47+4 =70 + 21 二88 + 3 =26

34、+ 8 =19 + 6 =21+61=28 + 5 =23+8 =89 + 6 =85+13=75 + 5 =26 + 9 =25 + 6 =42-5=50 + 37 =61+9 =85+4 =35 + 37二91+8 =73 + 7 =37+4 =30 + 54=78 + 3 =9 + 25 =35 + 6 =59 + 26=2+40 =16 + 9 =5+18 =16 + 5=17 + 3 =48+8 =35+8 =68 + 5=4+19 =39 + 8 =26 + 7 =3 + 46=7 + 38 =32+8 =25 + 5 =25-4=13 + 7 =16 + 9 =34 + 6 =6

35、3-5=5 + 37 =39 + 2 =27+4 =39 + 36=50 + 5 =10+40 =6+10 =15 + 64=18 + 50 =23 + 70 =47+4 =26+44二88 + 3 =26 + 8 =19 + 60 =50 + 21 二48 + 50 =83+8 =19 + 6 =20 + 28=75 + 5 =98-4 =63-5 =51 + 24 二15+4 =10+8 =99-9 =12 + 78=15-4 =30-3 =24-9 =77+1=70 + 3 =25+4 =38-8 =5+85=39+8 =9540 =82-5 =17 + 30 二78 + 5 =70 +

36、 30 =84-2 =48 + 52=68 + 7 =68-9 =60-7 =65+4=87+9 =38-9 =71+9 =24+ 34二39+10 =88-9 =70-5 =53 + 41=39 + 8 =58-10 =30-3 =57-1 =48 + 7 =20 + 5 =64-32 =22 + 24=87-72 =88-8 =48-29 =60 + 29二62 + 26 =86-77 =39-36 =12 + 58=75 + 24 =51+27 =8 + 91 =1+55 二24+43 =13 + 74 =89-53 =14 + 29=74 55 =80+18 =6 + 67 =8 +

37、23=1 + 18 =93-33 =55 + 5 =23-5=100-57 =34 + 53 =23-17 =68+ 24二76-65 =72 + 23 =43+42 =29-2=75-14 =40-33 =68+15 =43+44二10 + 32 =76+14 =644 =57-7=62 + 32 =83-62 =68-11 =10 + 38 二78-15 =69-8 =10+15 =30 + 70=50+16 =98-44 =2 + 94 =90 + 2=76+4 =65 + 9 =21 + 5 =14 + 65=100-56 =29 + 67 =34-16 =36-7=36+49 =39

38、-23 =95-83 =17 + 66=45 + 13 =82+13 =17+43 =49+4 二13 + 55 =93-38 =91-37 =61 + 27=59-54 =73 + 23 =78-57 =47 + 6=4-1 =95-26 =68-44 =66 + 21=84+1 =57+19 =71-17 =47-6=3 + 67 =39 + 9 =9 + 5 =38 + 60=54+46 =90-29 =22 + 38 =45-3=52-11 =89-42 =27-14 =86 + 6=33-9 =44-28 =29 + 30 =48+13 =58-8 =8+10 =83-31 =57+

39、13 =12 + 7 =50-19 =74-68 =24 + 53 =58 + 16 =18 + 56 =27 + 70 =100-71 =53-4 =79-32 =24+49 =33-30 =23-10 =20 + 26 =45-43 =14-1 =21+35 =34-13 =65-23 =25 + 29 =48 + 7 =27 + 34 =100-28 =57 + 41 =2 + 55 =89-67 =37+47 =60-4 =44-31 =5+48 =42 + 2 =85 + 6 =59 + 3 =96-43 =48-7 =8-3 =16-14 =92-63 =17+1 =59+17 =

40、30+41 =48-47 =50+18 =98-71 =67 + 12 =53 + 22 =63+10 =63-5 =65-21 =16 + 70 =59-38 =93-8 =23 + 24 =46-29 =23-6 =6 + 7 =8 + 72 =12 + 58 =80-6 =24+42 =9 + 54 =99 45 =68-6 =67-30 =51-49 =7 + 5 =59-5 =74+15 =32-1 =2 + 75 =81 + 18=71-58 =92-83 =95-75 =24-3 =64-32 =39-13 =17 + 3 =78+4 =48-29 =81-2 =72+10 =5

41、5-16 =39-36 =74-49 =70 + 26 =26 + 50 =8 + 91 =69-29 =39+45 =80-61 =89-53 =83 + 7 =45-35 =29 + 24 =6 + 67 =72 + 7 =48 + 27 =60-29 =55 + 5 =21+55 =1 + 35 =31-20 =23-17 =71+25 =94-25 =23+41 =43+42 =20 + 55 =43+1 =68 + 6 =68+15 =57-44 =97-7 =50 + 23 =64-4 =83-22 =25 + 58 =49 + 25 =68-11 =46-28 =47-6 =5

42、+ 91 =10+15 =66 + 34 =61-55 =15 + 77 =2 + 94 =29 + 68 =60 + 6 =2 + 61 =21+5 =50 + 20 =29 + 71 =12+17 =34-16 =86-38 =51-33 =68 + 20 =95-83 =92-58 =94-39 =47-29 =17+43 =11+87 =41-11 =86-73 =91-37 =91-73 =97-38 =97-34 =78-57 =44+5 =11+66 =73 + 26 =68-44 =41+34 =9 + 57 =94-54 =71-17 =20 + 20 =97-62 =2+8

43、1 =9 + 5 =65 + 24 =44-37 =43 + 53 =22 + 38 =4+20 =69 + 31 =8 + 6 =27-14 =45+40 =55-54 =87-34 =15 + 37=49+49 =73-37 =62-3 =7+19 二25+45 =84 50 =79-68 =11 + 85=84-71 =13+84 =17+46 =42 + 29二80-66 =13-4 =39 + 55 =2 + 27 二80-70 =16 + 71 =74-33 =11-6=33 + 25 =94-81 =94-47 =21 + 21=93-68 =51 11 =6411 =77 +

44、22二31+27 =7614 =65-50 =5 + 88=99-71 =90-38 =88-10 =56 + 39二51-3 =43 + 23 =65+12 =5 + 54=99-14 =62 + 3 =43+41 =1+25=4 + 76 =63-24 =20 + 33 =34-9=20 + 53 =56+14 =92-49 =47 + 32二75-6 =81 + 1 =19 + 76 =41 + 2 二9 + 23 =19+10 =98-86 =22-7=52 + 28 =96-41 =65 + 2 =57 + 34=37+47 =25+10 =80+1 =11+35 二61-48 =1

45、00-89 =84-10 =25 + 73=7 + 36 =61+9 =57-19 =31+30 二33-15 =9+16 =75+13 =12-9=61-25 =4 + 35 =66-45 =48+43二52-5 =12 + 2 =21 + 25 =60 + 6=27 + 68 =16 + 68 =27 + 34 =21+2=62-61 =464 =83-35 =68 + 26=90-89 =58-33 =71-58 =86+4 二16+84 =50-42 =90 + 3 =33 + 29=45 + 55 =73+15 =68-52 =71+21 二68 + 15 =49 + 30 =43-

46、30 =26 + 72=45+17 =43-27 =80-54 =51 + 12 二91-25 =20 + 75 =79-56 =8 + 6=79 + 8 =99-29 =36 + 64 =67+15 二59 + 37 =19 + 56 =7 + 35 =50+10=4+54 =33 + 55 =34+8 =48+ 20二68-9 =35+46 =59-36 =21 + 20=57+15 =34+13 =59-27 =54+11 二94-34 =59-13 =67+19 =31 + 39=90-33 =99-22 =20+16 =57 + 31 二27+45 =98-63 =64+17 =26 + 54=50+11 =49 + 3