题目内容
计算下面各题,能用简便算法的就用简便算法.
0.375×
÷
×
+
×
÷[
-(
+
)].
0.375×
| 2 |
| 9 |
| 6 |
| 7 |
| 2 |
| 13 |
| 2 |
| 5 |
| 2 |
| 5 |
| 11 |
| 13 |
| 4 |
| 9 |
| 5 |
| 6 |
| 1 |
| 6 |
| 1 |
| 3 |
考点:整数、分数、小数、百分数四则混合运算,运算定律与简便运算
专题:运算顺序及法则,运算定律及简算
分析:(1)按照从左向右的顺序进行计算;
(2)根据乘法分配律进行简算;
(3)中括号里面根据减法的性质进行简算,最后算除法.
(2)根据乘法分配律进行简算;
(3)中括号里面根据减法的性质进行简算,最后算除法.
解答:
解:(1)0.375×
÷
=
÷
=
;
(2)
×
+
×
=(
+
)×
=1×
=
;
(3)
÷[
-(
+
)]
=
÷[
-
-
]
=
÷[
-
]
=
÷
=
.
| 2 |
| 9 |
| 6 |
| 7 |
=
| 1 |
| 12 |
| 6 |
| 7 |
=
| 7 |
| 72 |
(2)
| 2 |
| 13 |
| 2 |
| 5 |
| 2 |
| 5 |
| 11 |
| 13 |
=(
| 2 |
| 13 |
| 11 |
| 13 |
| 2 |
| 5 |
=1×
| 2 |
| 5 |
=
| 2 |
| 5 |
(3)
| 4 |
| 9 |
| 5 |
| 6 |
| 1 |
| 6 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 5 |
| 6 |
| 1 |
| 6 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 2 |
| 3 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 1 |
| 3 |
=
| 4 |
| 3 |
点评:考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
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