题目内容
(2010?尤溪县模拟)0.25×1.25×4×8
2.125×
+1.875÷4.
2.125×
1 | 4 |
分析:(1)根据乘法交换律和乘法结合律进行计算即可得到答案;
(2)将算式中除以4改写成乘以
,然后再利用乘法分配律进行计算.
(2)将算式中除以4改写成乘以
1 |
4 |
解答:解:(1)0.25×1.25×4×8
=(0.25×4)×(1.25×8)
=1×10
=10;
(2)2.125×
+1.875÷4
=2.125×
+1.875×
=(2.125+1.875)×
=4×
=1.
=(0.25×4)×(1.25×8)
=1×10
=10;
(2)2.125×
1 |
4 |
=2.125×
1 |
4 |
1 |
4 |
=(2.125+1.875)×
1 |
4 |
=4×
1 |
4 |
=1.
点评:此题主要考查的是小数的简便运算和分数的简便运算.
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