小数乘除法计算题及其答案精编版

1、乘法：5.6 X 2.9=16.243.77 X 1.8=6.7860.02 X 96=1.925.22 X 0.3=1.5669.99 X 0.02=0.19984.67 X 0.9=4.2035X 2.44=12.21.666X 6.1 =10.16269.432 X 0.002=0.0188645.6 X 6.5 =36.44.88 X 2.9 =14.1525.61 X 4.3 =24.1238.9X 2.4 =21.365.5 X 55=302.59.77 X 0.02=0.19541.384X 5.1=7.05848.78 X 83=728.742.6 X 61=158.60.05

2、9X 0.2=0.01184.268 X 1.7=7.255657X 5.7 =324.99.46 X 2.85=26.96117.8 X 6.4=113.921.5 X 4.9 =7.352.5 X 0.88=2.25.555 X 5.2 =28.8862.22 X 3.33=7.39267.658 X 85=650.9336.02 X 0.3=10.80656.78 X8=454.24除法：85.44-16=5.3442.84-7=6.12101.7-9=11.367.5 -15=4.5230.4-6=38.421.24-36=0.590.736-23=0.03243.5 -12=3.62

3、535.21 -7=5.0339.6 -24=1.656.21 -0.03=207210-1.4 =15051.3 -0.27=19091.2 -3.8=240.756-0.18=4.20.66 -0.3=2.211.97-1.5=7.9869.6 -2.9 =2438.4 -0.8=4815-0.06=250循环小数的用简便方法，除不尽保留 2 位小数）：76.4 - 5.4 =14.148148 32-42=0.761904761904-1.7 - 0.03 =56.66 8.2 - 0.12 =68.33 0.8 - 0.9 =0.88 4.7 -3=1.566 1.25 - 1.2=1

4、.04166 14.36-2.7=5.31851858.33 -6.2 1.342.41 - 0.7 =3.44285714285714计算0.396 -1.2=0.330.756 - 0.36=2.115.6 X 13=202.80.18 X 15=2.70.025X14=0.353.06X36=110.160.04 X 0.12 = 0.00483.84 X 2.6 10.0 （保留一位小数）5.76 X 3= 17.287.15X22=157.390.75 - 3.3 =27.53.68X0.25=0.9216.9 -0.13=1301.55 - 3.9 =0.3974358974358

5、93.7X0.016=0.059213.76X0.8=11.0085.2X0.6=3.128.4X1.3=10.926.4X0.5=3.24.48X0.4=1.7925.25X5=26.2535.4X4.2=148.680.042X0.54=0.022680.76X0.32=0.24320.25X0.046=0.01152.52X3.4=8.5681.08 X 25=270.12 X 0.5 X 0.16 = 0.00964.8X 0.25 = 1.20.125 X 1.40.18 （保留两位小数）2.5- 0.73.571 （保留三位小数）10.1 - 3.3=3.0606（商用循环小数）1

6、0.75 - 12.5=0.86 （用乘法验算）3.25X9.04= 29.38 （用除法验算）3、脱式计算（能简算的要简算）2.5X7.1X416.12X 9916.125.2X0.90.9=（2.5X4）X 7.1=16.12X（ 99+1）5.2+1 ）X 0.9=10X 7.1=16.12X 100=6.2X 0.9=71=1612=5.587.28X 99+7.284.3X 50X 0.2642.64X0.5=64-1.32=7.28 x( 99+1)=4.3 x( 50X 0.2 )=62.68=7.28 x 100=4.3 x 10=728=43(2.275=2.9=0.8122

7、6x15.715.7 x 24 = (26+24) x 15.7 =50x 15.7 =78.53.94+34.3 x0.21.2=3.94+6.86=1.2=10.8=4.80.625) x 0.28x 0.28x (9.6 - 2.4) - 4.8x 4-4.8-4.8=18.9x1.1 x4.72.7x5.4x3.93.6x9.85 -5.46=9.79x 4.7=14.58x 3.9=35.46-5.46=46.013=56.862=308.05x3.4+7.66.58x4.5x0.92.8x0.5+1.58=27.37+7.6=29.61x 0.9=1.4+1.58=34.97=26

8、.649=2.98324.9 0.94.84.8 x 0.5(1.250.125) x 8=36.9-0.9=4.8-2.4=1.25x 8-0.125 x 8=36=2.4=10-1=94.8 x 100.156.5x 9956.57.09x 10.80.8 x7.09=4.8 X 100+4.8 X 0.1=56.5x( 99+1)=7.09 X(10.8-0.8 )=480+0.48=56.5X 100=7.09X10=480.48=5650=70.94.85 + 0.35宁1.48.7 X 17.48.7X 7.4=4.85+0.25=8.7X10=5.1=8712.5X0.4X2.5

9、X80.87X3.16+4.649.5X101=(12.5 X 8)X (0.4 X 2.5)=2.7492+4.64=9.5X 100+9.5=100X 1=7.3892=950+9.5=100=959.50.68 -(5.2 -3.5 ) X 1.2540.5-0.810.18=0.68 - 1.7 X 1.25=50X 0.18=0.4X1.25=9=0.54.8 X( 15 - 2.4 )6.81+6.81X 990.25X 185X 40=4.8X 6.25=6.81X (1+99)=(0.25X 40) X 185=30=6.81X 100=10X 185=681=18504.4X

10、0.83.4X0.8(9.37+937+937+937) X 2 5=(4.4-3.4) X 0.8=(9.37X 4) X 2.5=1X 0.8=9.37X (4 X 2.5)=0.8=9.37X 10=93.72.37 X 6.3+2.37 X 3.72.5 X 1.25 X 0.32=2.37 X (6.3+3.7)=2.5X 1.25 X 0.4 X 0.8=2.37X 10=(2.5X 0.4) X (1.25 X0.8)=23.7=1X 1=13.8X10.12.5X(3.8 X0.04)7.69X101=3.8 X10+3.8X0.1 =2.5 X0.04X3.8=7.69X10

11、0+7.69=38.38=0.38=776.690.25X39+0.250.125X7246X0.33+54X0.33=0.25X(39+1)=0.125 X8X9=(46+54) X0.33=0.25X40=1X9=100X0.33=10=9=33(8X5.27) X1.256.81+6.81 X990.25X185X40=(8X1.25) X 5.27=6.81X (1+99)=0.25X 40X 185=10X 5.27=6.81X 100=10X 185=52.7=681=18506.8 X 0.75 - 0.53.75-0.125 - 2.751.53+23.4 - 7.2=5.1 - 0.5=30-2.75=1.53+3.2