题目内容
用简便方法计算.
| 63+8.7+8.7×3.7 | (
|
(1)8.7×(6.3+3.7),
=8.7×(6.3+3.7),
=8.7×10,
=87;
(2)(
-
+
)×12.
=
×12-
×12+
×12,
=4-2+3,
=5.
=8.7×(6.3+3.7),
=8.7×10,
=87;
(2)(
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 4 |
=
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 4 |
=4-2+3,
=5.
练习册系列答案
相关题目