题目内容
计算:1.25×88
+2×1
×
+
×12
+
×
= .
| 16 |
| 17 |
| 1 |
| 4 |
| 4 |
| 17 |
| 5 |
| 8 |
| 8 |
| 17 |
| 1 |
| 4 |
| 30 |
| 17 |
考点:整数、分数、小数、百分数四则混合运算
专题:运算顺序及法则
分析:先把原算式进行变形,然后根据乘法分配律简算.
解答:
解:1.25×88
+2×1
×
+
×12
+
×
=1
×88
+2×1
×
+
×6
+
×
=1
×(88
+
+6
+
)
=
×96
=120.
故答案为:120.
| 16 |
| 17 |
| 1 |
| 4 |
| 4 |
| 17 |
| 5 |
| 8 |
| 8 |
| 17 |
| 1 |
| 4 |
| 30 |
| 17 |
=1
| 1 |
| 4 |
| 16 |
| 17 |
| 1 |
| 4 |
| 4 |
| 17 |
| 5 |
| 4 |
| 4 |
| 17 |
| 5 |
| 4 |
| 6 |
| 17 |
=1
| 1 |
| 4 |
| 16 |
| 17 |
| 8 |
| 17 |
| 4 |
| 17 |
| 6 |
| 17 |
=
| 5 |
| 4 |
=120.
故答案为:120.
点评:简算时看到此类“几个乘法算式相加减”的题,先观察这几个乘法有没有相同因数,或者能不能转化出相同因数.
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