文本内容:
小数乘法简便计算练习题小数乘法的简便计算的方法
1、分析算式的结构
(1)连乘,考虑乘法交换律和结合律;(
2、)乘加或乘减,考虑乘法分配律
2、当结构不完整时,我们可以通过变式、拆分的方法,让算式变成符合运算律的形式,再进行简算
3、注意口算要准确
0.25×
8.5×
412.5×
0.96×
0.
80.25×
0.73×
44.36×
12.5×
80.25×
16.2×
41.25×
2.5×
323.2×
0.25×
12.
50.25×
361.25-
0.125×
84.8×
10.
13.6×
1020.39×
1990.32×
4033.65×
10.
10.85×
9.
93.72×
3.5+
6.28×
3.
515.6×
2.1-
15.6×
1.
14.8×
7.8+78×
0.
5256.5×99+
56.
57.09×
10.8-
0.8×
7.
091.87×
9.9+
0.
1874.2×99+
4.
23.8×
4.56+
3.83×
5.
449.7×99+
9.
727.5×
3.7-
7.5×
3.
73.14×
0.68+
31.4×
0.
0327.2×
0.2+
2.4×
1.
45.4×11-
5.
47.74×(
2.8-
1.3)+
1.5×
2.
263.9×
2.7+
3.9×
7.
312.7×
9.9+
1.
272.3×16+
2.3×23+
2.
33.65×
4.7-
36.5×
0.37101×
0.87-
0.91×8746×57+23×
8610.7×
16.1-
15.1×
10.
77.6×
0.8+
0.2×
7.
61.28×
8.6+
0.72×
8.
610.6×
0.35-
9.6×
0.
358.9×
1.
010.65×10148×
0.56+44×
0.
480.279×343+
0.657×
2790.264×519+264×
0.
4819.16×
1.53-
0.053×
91.
60.125×
9612.5×
10.8(20-4)×
0.2545×21-50×
2.145×
1.58+
5.5×
15.825×
7.3×
0.4。