题目内容
(1)(
-
×99)÷
(2)
×
+
×
(3)(16×
+4)÷
.
| 1 |
| 4 |
| 1 |
| 4 |
| 25 |
| 24 |
(2)
| 4 |
| 7 |
| 8 |
| 9 |
| 3 |
| 7 |
| 8 |
| 9 |
(3)(16×
| 3 |
| 8 |
| 2 |
| 7 |
分析:(1)根据乘法分配律计算括号里面的,再将除法变为乘法,约分计算即可求解;
(2)根据乘法分配律计算即可;
(3)先算括号里面的,再算括号外面的除法.
(2)根据乘法分配律计算即可;
(3)先算括号里面的,再算括号外面的除法.
解答:解:(1)(
+
×99)÷
=
×100×
,
=24;
(2)
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(3)(16×
+4)÷
,
=(6+4)×
,
=10×
,
=35.
| 1 |
| 4 |
| 1 |
| 4 |
| 25 |
| 24 |
=
| 1 |
| 4 |
| 24 |
| 25 |
=24;
(2)
| 4 |
| 7 |
| 8 |
| 9 |
| 3 |
| 7 |
| 8 |
| 9 |
=(
| 4 |
| 7 |
| 3 |
| 7 |
| 8 |
| 9 |
=1×
| 8 |
| 9 |
=
| 8 |
| 9 |
(3)(16×
| 3 |
| 8 |
| 2 |
| 7 |
=(6+4)×
| 7 |
| 2 |
=10×
| 7 |
| 2 |
=35.
点评:此题主要考查分数的四则混合运算的运算顺序和应用运算定律进行简便计算.
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