题目内容
13
+86
×0.25+0.625×86
+86
×
=
| 4 |
| 19 |
| 15 |
| 19 |
| 15 |
| 19 |
| 15 |
| 19 |
| 1 |
| 8 |
100
100
.分析:此题应为13
+86
×0.25+0.625×86
+86
×
,根据数字特点,此题运用乘法分配律进行简算.
| 4 |
| 19 |
| 15 |
| 19 |
| 15 |
| 19 |
| 15 |
| 19 |
| 1 |
| 8 |
解答:解:13
+86
×0.25+0.625×86
+86
×
=13
+86
×0.25+0.625×86
×0.125
=13
+86
×(0.25+0.625+0.125)
=13
+86
×1
=13
+86
=100.
故答案为:100.
| 4 |
| 19 |
| 15 |
| 19 |
| 15 |
| 19 |
| 15 |
| 19 |
| 1 |
| 8 |
=13
| 4 |
| 19 |
| 15 |
| 19 |
| 15 |
| 19 |
=13
| 4 |
| 19 |
| 15 |
| 19 |
=13
| 4 |
| 19 |
| 15 |
| 19 |
=13
| 4 |
| 19 |
| 15 |
| 19 |
=100.
故答案为:100.
点评:仔细注意观察题目中数字构成的特点和规律,运用运算定律或运算技巧,进行简便计算.
练习册系列答案
相关题目