题目内容
能简算的用简便方法
4×(
-
÷37.5%)
+(
-
)÷
×
+
÷
×
×2
.
4×(
| 8 |
| 5 |
| 3 |
| 8 |
| 15 |
| 16 |
| 7 |
| 16 |
| 1 |
| 4 |
| 1 |
| 2 |
| 5 |
| 6 |
| 5 |
| 8 |
| 1 |
| 6 |
| 8 |
| 5 |
| 3 |
| 8 |
| 5 |
| 6 |
| 2 |
| 3 |
考点:分数的四则混合运算,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)按照先算括号里面的除法,再算括号里面的减法,最后算括号外面的乘法顺序即可解答,
(2)先算括号里面的减法,再算除法,最后算括号外面的加法顺序计算即可解答,
(3)运用乘法分配律解答,
(4)按照从左到右顺序计算即可解答.
(2)先算括号里面的减法,再算除法,最后算括号外面的加法顺序计算即可解答,
(3)运用乘法分配律解答,
(4)按照从左到右顺序计算即可解答.
解答:
解:(1)4×(
-
÷37.5%)
=4×(
-1)
=4×
=2
;
(2)
+(
-
)÷
=
+
÷
=
+
=1
;
(3)
×
+
÷
=(
+
)×
=1×
=
;
(4)
×
×2
=
×2
=
.
| 8 |
| 5 |
| 3 |
| 8 |
=4×(
| 8 |
| 5 |
=4×
| 3 |
| 5 |
=2
| 2 |
| 5 |
(2)
| 15 |
| 16 |
| 7 |
| 16 |
| 1 |
| 4 |
| 1 |
| 2 |
=
| 15 |
| 16 |
| 3 |
| 16 |
| 1 |
| 2 |
=
| 15 |
| 16 |
| 3 |
| 8 |
=1
| 5 |
| 16 |
(3)
| 5 |
| 6 |
| 5 |
| 8 |
| 1 |
| 6 |
| 8 |
| 5 |
=(
| 5 |
| 6 |
| 1 |
| 6 |
| 5 |
| 8 |
=1×
| 5 |
| 8 |
=
| 5 |
| 8 |
(4)
| 3 |
| 8 |
| 5 |
| 6 |
| 2 |
| 3 |
=
| 5 |
| 16 |
| 2 |
| 3 |
=
| 5 |
| 6 |
点评:(1)依据四则运算计算方法正确进行计算,(2)正确运用简便方法解决问题,是本题考查知识点.
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