1、許家莊小學小數乘除法專項練習8.9 X 2.4 =5.5 X 55=9.77 X 0.02 =乘法5.6 X 2.9 =3.77 X 1.8 =0.02 X 96=5.22 X 0.3 =9.99 X 0.02 =4.67 X 0.9 =5X2.44 =1.666 X 6.1 =9.432 X 0.002 =5.6 X 6.5 =4.88 X 2.9 =5.61 X4.3 =1.384 X 5.1 =8.78 X 83=2.6 X 61 =0.059 X 0.2 =4.268 X 1.7 =57X5.7 =9.46 X 2.85 =17.8 X 6.4 =1.5 X 4.9 =7.658 X

2、85=36.02 X 0.3=56.78 X 8 =2.5 X 0.88 =5.555 X5.2 =2.22 X 3.33 =除法：85.44-16=42.84-7 =101.7 *9 =0.66-0.3 =11.97-1.5 =69.6-2.9 =67.5-15=230.4-6 =21.24-36=0.736-23=43.5-12=35.21 -7 =39.6-24=6.21 -0.03 =2101.4 =51.3-0.27 =91.2-3.8 =0.756-0.18 =38.4-0.8=15-0.06 =（循環小數的用簡便方法，除不盡保留 2位小數）：8.2-0.12 =0.8-0.9 =

3、76.4-5.4 =4.7-3 =1.25-1.2 =32-42=14.36-2.7 =8.33 十6.21.7-0.03=2.41 -0.70.396-1.2=0.756-0.36=3.06 X 36=15.6 X 13=計算0.18 X 15=0.025 X 14=0.04 X 0.12 =3.84X2.6 （保留一位小數）5.76X3 =6.4 X 0.5 =4.48 X0.4 =5.25 X 5 =7.15 X 22=90.75-3.3 =3.68 X 0.25 =16.9-0.13 =1.55-3.9 =3.7 X 0.016 =13.76 X 0.8=5.2X 0.6 =8.4 X

4、 1.3 =35.4 X 4.2 =0.042 X 0.54 =0.76 X 0.32 =0.25 X 0.046 =2.52 X 3.4 =1.08 X 25=0.12 X 0.5 X 0.16=4.8X0.25 =0.125 X 1.4 （保留兩位小數）2.5 -0.7（保留三位小數）10.1 -3.3=（商用循環小數）10.75 -12.5=（用乘法驗算）3.25 X 9.04=（用除法驗算）3、脫式計算（能簡算的要簡算）2.5 X7.1 X 416.12X 99+16.125.2X0.9 +0.97.28 X 99+7.284.3X 50X0.264 2.64 X 0.526X 15.

5、7 + 15.7 X 24(2.275+ 0.625) X0.283.94+34.3 X 0.21.2X(9.6 -2.4) -4.88.9 X 1.1 X4.72.7 X 5.4 X 3.93.6 X 9.85 -5.468.05 X3.4+7.66.58 X 4.5 X 0.92.8X 0.5+1.5812.5 X 0.4 X 2.5 X 80.87 X 3.16+4.649.5 X 10132 + 4.9 0.94.8-4.8 X0.5(1.25-0.125) X84.8 X 100.156.5X 99+56.57.09-0.8 X7.094.85 + 0.35- 1.48.7 X 17.4-8.7 X 7.40.68 - (5.2 -3.5 ) X 1.2540.5-0.81 X 0.184.8 X (15 - 2.4 )6.81+6.81X990.25X 185X404.4 X0.8 -3.4 X 0.8(9.37+9. 37+9. 37+9.2.37 X 6.3+2.37 X 3.72.5 X 1.25 X 0.323.8 x 10.12.5 X (3.8 X 0.04)7.69 X 1010.25 X 39+0.250.125 X 7246X0.33+54X0.33(8 X 5.27)X 1.256.81+6.8