1、（1）97 + 258=369204=101×25 =50×12 =360÷3 =300÷50 =（2）362 + 298=363199=32×101 =25×40 =450÷90 =90÷5 =（3）204 + 365=457302=125×8 =12×70 =480÷12 =500÷50 =（4）450 + 250=360240=50×24=310×6 =60÷15 =960÷30 =（5）4.1+ 0.9=2.31.8=0.2&#

2、215;9 =0.3×0.7 =0.6÷3 =0.15÷0.5 =（6）3 + 1.2=7.3 5 =0.2×0.4 =1.2×0.5 =2.4÷0.6 =24÷0.3 =（7）7.12+ 0.5 =6 1.8=1.5×0.4 =25×0.4 =4.2÷0.07 =4÷0.08 =（8）2 + 5.9=4.312.2=0.6×20 =1.6×30 =0.56÷7 =0.42÷0.6 =（9）2.4 + 4 =18.66 =40×1.2

3、=50×1.3 =0.48÷0.8 =3÷0.6 =（10）0.21 + 5 =6 2.6 =0.4×1.4 =1.5×0.8 =0.3÷0.5 =0.1÷0.2 = (11) + = + = + = = = =(12) + = + = + 2 =1=（13）×3 =×8 =×3 =8 × =3 × =10 × =（14）×=×=×=×=×=×=（15）÷4 =÷8 =÷10

4、=÷6=÷14÷22=（16）÷=÷=÷=÷=÷=÷=（17）88×3239×30219×20167×93195×41392×12（18）18×4122×198310×4142×19295×19239×112（19）352÷7462÷9425÷60334÷80360÷49238÷31（20）152÷3472÷

5、8415÷40364÷50360÷89268÷71（21） + = + = + = =（22） + =2 + = + = =2 = (23)×8=21×=×15=6×=×7=36×=(24)× =× =× =× =× =× =（25）÷2 =÷4 =÷7 =÷12 =÷9 =÷2 =（26）÷3 =÷3 =÷15 =÷4=÷2&

6、#247;4=（27）÷=÷=÷=÷=÷=÷=（28）÷=÷=÷÷=÷÷（29）14÷=÷8=5÷=÷=÷=4÷=（30）9÷=÷=÷=÷=÷=÷30=（31）÷18 = ÷4=4÷=÷6=5÷=÷5=（32）÷=÷=÷=3÷ =÷10=÷

7、=（33）÷=÷=÷=÷=÷=÷=（34）÷=÷=÷=9÷=÷5 =÷= (35)20÷=÷6=15÷=÷=8÷=10÷=(36)÷=÷=÷=÷5=÷=÷=（37）297 + 248=569203=101×36 =30×32 =450÷3 =720÷60 =（38）303 + 299=467105=59×10

8、1 =125×80 =750÷50 =95÷19=（39）604 + 165=857502=250×4 =13×60 =600÷12 =390÷39 =（40）459 + 290=360204=40×24=130×6 =750÷25 =960÷80 =（41）4.1+ 5.9=5.31.8=0.5×9 =0.9×0.7 =1.2÷6 =0.15÷15 =（42）7 + 1.2=5.3 5 =0.1×0.8 =1.8×0.3 =

9、24÷0.1 =3.4÷1.7 =（43）7.1+ 0.5 =4 1.8=1.4×0.4 =24×0.5 =0.42÷0.7 =6÷0.2 =（44）5 + 5.9=5.314.2=0.6×90 =1.5×30 =0.35÷7 =0.4÷0.5 =（45）2.5 + 4 =16.66 =60×1.2 =40×1.3 =4.8÷4.8 =30÷0.5 =（46）0.25 + 0.5 =8 2.6 =0.5×1.4 =1.2×0.8 =0.

10、3÷5 =0.1÷0.5 =（47）5 + 1.2=7.3 4 =0.5×0.3 =3÷0.6 = + =（48）3.6+ 0.9=7.21.8=0.6×9 =2.4÷3 = + = =（49）81×3239×39720×20178×91190×21292×32（50）48×6121×298390×3149×9297×3942×192（51）352÷5412÷8235÷30344

11、7;70360÷59238÷41（52）182÷9482÷6105÷20390÷80460÷89268÷51（53）0.03 + 5 =42.6 =0.3×1.4 =0.4÷0.5 = + =（54）4 + 5.9=6.542.2=0.7×20 =0.42÷7 = + = =（55）3.6+ 0.9=7.21.8=0.6×9 =2.4÷3 = + = =（56）5 + 1.2=7.3 4 =0.5×0.3 =3÷0.6 = + =（57

12、）2.12+ 0.5 =5 1.8=1.4×0.5 =3.5÷0.07 = + =（58）5.3 + 4 =16.26 =30×1.2 =0.4÷0.8 =+ 3 =1= (59)×10 =×6 =10× =×3 =22× =×5 =(60)1 ×=7× =×12 =×10 =6 × =× 10 =（61）×=×=×=×=×=×=（62）×=×=×

13、=×=×=×=（63）÷8 =÷4=÷6=÷10=÷7÷11=（64）÷2 =÷3 =÷8=÷10 =÷5 =÷6 =（65）21÷=÷=÷=8÷=÷5=8÷=（66）÷15=3÷=÷=÷=÷=÷=（67）÷4=6÷=5÷=4 ÷=÷5=18÷=（68）÷=÷=÷=3÷ =