100道小数乘法计算题

1、100 道小数乘法计算题1100 道小数乘法计算题13.42 * 4.73 =8.12 =7.23 * 1.2 =2.14 * 8.3 =21.98 * 2.31 =28.37 =29.13 * 3.14 =11.21 =5.5 / 11 =0.5 =60 / 120 =72 / 9 =0.12 =6.75 / 0.25 =0.75 =24 / 1.2 =1 计算下列各题（1）9.65 *6.3 * 12 =4.9 * 1.12 =0.24 *9.88 *7.5 /32 / 8 =12 /12 /21 / 0.70.980.39B=139.55X2.3169.02 125.7- (56+ 5.

2、7 )(3)18.6-9.3-3.6-1.7(4) 0.8 + 9.8 +99.8 + 999.8 + 9999.8(5)8.88X1.25(6) 12.5X64X2.5X0.5(0.125 + 1.25 + 12.5 +125) X8(8)17.48 X 37+ 17.48 X 82-174.8 X 1.9(9) 14.5 +7.65 X4+25.5 +2.35 X 4 + 40(10) (8.6X 7.5 X 5.1 ) + (2.5X4.3 X1.7)(11) 333387.5 X 89+ 890X66661.25(12)0.84+ 2.5(13) 1.25 X3.2计算0.1 + 0.

3、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=139.54X2.317(13)0.02x5当A为何值时，下面等式成立：2.6 X1.5 +AX1.5 +0.15 X 34=76X0.15(1)6.3X0.63.78(2)8.8X 4 = 35.2(3)1.2X0.9= 1.08(4)2 X 0.7= 1.4(5)9.9X0.7=6.93(6)2.2 X 5 = 11(7)9.6X876.8(8)9.2 X 7 =64.4(9)7.2X428.8(10)3.6 X 2

4、=7.2(11)3.6X2.9=10,836(12)5.77 X 1.8=9.5496=1.92(14)5.22 X 0.3=1.566(15)9.99X0.02=0.198(16)4.67 X 0.9=4.203(17)5X2.44=12.2(18)1.666 X6.1 = 10,126(19)9.432X0.002=0.018864(20)5.6 X 6.5=36.4(21)4.88X2.9=14,152(22)5.6 X 2.9 =16.24(23)3.77X1.8=6.786(24)0.02 X 96 =1.92(25)5.22X0.3=1.566(26)9.99 X0.02 =0.1

5、998(27)4.67X0.9=4.023(43)9.46x2.85=(29)1.666X6.1= 10.16269.(30)432 X 0.002=0.018864(31)5.6X6.5=36.4(32)4.88 X2.9 =14.152(33)5.614.3=24.123(34)8.9 X2.4 =21.36(35)5.555=302.5(36)9.77 X0.02 =0.1954(37)1.384X5.1=7.(38)05848.78 83=736.21(39)2.661=158.6(40)0.0590.2= 0.0118(41)4.2681.7=7.2556(42)575.7 =324

6、.926.961(44)17.8 X6.4 =113.92(45)1.5X4.9=7. (46)352.5 X0.88 =2.2(47)5.5555.2=28.886 (48)2.223.33 =7.3926(49)7.65885=650.93 (50)36.02 X0.3 =10.806 (51)56.788=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

7、+10000-0.2 = 11111-0.2 X5 =11110 (5)原式=1.11 X (8X1.25) =11.1 (6)原式=(12.5X8) X (2.5X4) X (0.5X2) =10007 原式=0.125 X 8+1.25 X 8+12.5 X8+125X 8=1111(8)原式=17.48 X (37+ 82-19) =1748(9)原式=(14.5 +25.5) + ( 7.65 +2.35) X4+40=40+ 40 + 40=120(10)原式=(8.6+4.3) X ( 7.5 -2.5) 乂 (5.1 +1.7) =2X3X3=18(11)原式=333387.5X89 + 89X666612.5=(333387.5+666612.5