100道小数乘法计算题

100道小数乘法计算题

100道小数乘法计算题

13.42 * 4.73 = 9.65 * 8.12 =

7.23 * 1.2 = 6.3 * 12 =

2.14 * 8.3 = 4.9 * 1.12 =

21.98 * 2.31 = 0.24 *

28.37 =

29.13 * 3.14 = 9.88 * 11.21 =

5.5 / 11 = 7.5 / 0.5 =

60 / 120 = 32 / 8 =

72 / 9 = 12 / 0.12 =

6.75 / 0.25 = 12 / 0.75 =

24 / 1.2 = 21 / 0.7 =

1．计算下列各题

（1）0.98＋0.39＋

9.02

（2）125.7-（56＋5.7）

（3）18.6-9.3-3.6-1.7

（4）0.8＋9.8＋99.8＋999.8＋9999.8

（5）8.88×1.25

（6）12.5×64×2.5×0.5

（7）（0.125＋1.25＋12.5＋125）×8 （8）17.48×37＋17.48×82-174.8×1.9

（9）14.5＋7.65×4＋25.5＋2.35×4＋40 （10）（8.6×7.5×5.1）÷（2.5×4.3×1.7）

（11）333387.5×89＋890×66661.25 （12）0.84÷2.5

（13）1.25×3.2

计算

0.1＋0.3＋0.5＋0.7＋0.9＋0.11＋0.13＋0.15＋0.17＋0.19+0.21＋0.23＋…+0.99．

比较下面两个积的大小：

A=139.54×2.317

B=139.55×2.316

当A为何值时，下面等式成立：

2.6×1.5＋A×1.5＋0.15×34=76×0.15

(1)6.3 ×0.6 = 3.78

(2)8.8 × 4 = 35.2

(3)1.2 ×0.9 =1.08

(4)2 × 0.7 = 1.4

(5)9.9 ×0.7 =6.93

(6)2.2 × 5 = 11

(7)9.6 ×8 = 76.8

(8)9.2 × 7 = 64.4

(9)7.2 × 4 = 28.8

(10)3.6 × 2 = 7.2

(11)3.6×2.9=10.836

(12)5.77×1.8=9.54

(13)0.02×

96=1.92

(14)5.22×0.3=1.566

(15)9.99×0.02=0.198

(16)4.67×0.9=4.203

(17)5×2.44=12.2

(18)1.666×6.1=10.126

(19)9.432×0.002=0.018864 (

20)5.6×6.5=36.4

(21)4.88×2.9=14.152

(22)5.6×2.9 =16.24

(23)3.77× 1.8 =6.786

(24)0.02×96 =1.92

(25)5.22×0.3= 1.566

(26)9.99×0.02 =0.1998

(27)4.67×0.9 =4.023

(28)5×2.44 =12.2

(29)1.666× 6.1 =10.16269.

(30)432×0.002=0.018864

(31)5.6× 6.5 =36.4

(32)4.88×2.9 =14.152

(33)5.61× 4.3 =24.123

(34)8.9×2.4 =21.36

(35)5.5×55 =302.5

(36)9.77×0.02 =0.1954

(37)1.384× 5.1 =7.

(38) 05848.78×83=736.21

(39)2.6×61 =158.6

(40)0.059×0.2= 0.0118

(41)4.268× 1.7 =7.2556

(42)57×5.7 =324.9

(43)9.46× 2.85= 26.961

(44)17.8×6.4 =113.92

(45)1.5× 4.9 =7.

(46) 352.5×0.88 =2.2

(47)5.555× 5.2 =28.886

(48)2.22×3.33 =7.3926

(49)7.658×85 =650.93

(50)36.02×0.3 =10.806

(51)56.78×8=454.24.

解题答案：

1．（1）原式=（0.98+9.02）+0.39=10.39

（2）原式=（125.7-5.7）-56=64

（3）原式=（18.6-3.6）-（9.3＋1.7）=4

（4）原式=1-0.2＋10-0.2+100-0.2＋1000-0.2+10000-0.2

=11111-0.2×5

=11110

（5）原式=1.11×（8×1.25）=11.1

（6）原式=（12.5×8）×（2.5×4）×（0.5×2）=1000

（7）原式=0.125×8+1.25×8+12.5×8+125×8=1111 （8）原式=17.48×（37＋82-19）=1748

（9）原式=（14.5＋25.5）＋（7.65＋2.35）×4＋40

=40＋40＋40=120

（10）原式=（8.6÷4.3）×（7.5÷2.5）×（5.1÷1.7）=2×3×3=18

（11）原式=333387.5×89＋89×666612.5

=（333387.5+666612.5）×89

=89000000

（13）原式=（0.84×4）÷（2.5×4）=3.36÷10=0.336 （14）原式=（1.25×4）×（3.2÷4）=10×0.8=8