题目内容
运用运算定律或性质进行简算:
| (1)8.6-3.47-0.53 | (2)
|
(1)8.6-3.47-0.53,
=8.6-(3.47+0.53),
=8.6-4,
=4.6;
(2)
×
+
×
,
=(
+
)×
,
=
.
=8.6-(3.47+0.53),
=8.6-4,
=4.6;
(2)
| 5 |
| 7 |
| 8 |
| 11 |
| 2 |
| 7 |
| 8 |
| 11 |
=(
| 5 |
| 7 |
| 2 |
| 7 |
| 8 |
| 11 |
=
| 8 |
| 11 |
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