题目内容
| 5 |
| 8 |
| 35 |
| 8 |
| 1 |
| 4 |
| 7 |
| 12 |
| 11 |
| 18 |
| 5 |
| 36 |
分析:(1)先把除法变成乘法,再运用乘法分配律简算;
(2)先把除法变成乘法,再运用乘法分配律简算.
(2)先把除法变成乘法,再运用乘法分配律简算.
解答:解:(1)
÷4+
×
=
×
+
×
=(
+
)×
=5×
=
;
(2)(
+
)÷
=(
+
)×
=
×
+
×
=
+
=
.
| 5 |
| 8 |
| 35 |
| 8 |
| 1 |
| 4 |
=
| 5 |
| 8 |
| 1 |
| 4 |
| 35 |
| 8 |
| 1 |
| 4 |
=(
| 5 |
| 8 |
| 35 |
| 8 |
| 1 |
| 4 |
=5×
| 1 |
| 4 |
=
| 5 |
| 4 |
(2)(
| 7 |
| 12 |
| 11 |
| 18 |
| 5 |
| 36 |
=(
| 7 |
| 12 |
| 11 |
| 18 |
| 36 |
| 5 |
=
| 7 |
| 12 |
| 36 |
| 5 |
| 11 |
| 18 |
| 36 |
| 5 |
=
| 21 |
| 5 |
| 22 |
| 5 |
=
| 43 |
| 5 |
点评:此题是考查四则混合运算,要仔细观察算式的特点,灵活运用一些定律进行简便计算.
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