题目内容
能简算的要简算.
7
+77
+777
+
×3
÷6+1÷6×
48×(
+
-
)
95.6×37%+4.4×0.37.
7
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 1 |
| 5 |
| 9 |
| 25 |
| 16 |
| 25 |
48×(
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 3 |
95.6×37%+4.4×0.37.
考点:分数的巧算
专题:计算问题(巧算速算)
分析:(1)注意数字拆分,然后再进行计算.
(2)把除法变为乘法,运用乘法分配律简算.
(3)(4)运用乘法分配律简算.
(2)把除法变为乘法,运用乘法分配律简算.
(3)(4)运用乘法分配律简算.
解答:
解:(1)7
+77
+777
+
×3
=(7+77+777)+
×3+
=861+(
+
)
=861+2
=863
(2)
÷6+1÷6×
=
×
+1×
×
=(
+
)×
=1×
=
(3)48×(
+
-
)
=48×
+48×
-48×
=12+8-16
=4
(4)95.6×37%+4.4×0.37
=95.6×0.37+4.4×0.37
=(95.6+4.4)×0.37
=100×0.37
=37
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 1 |
| 5 |
=(7+77+777)+
| 4 |
| 5 |
| 3 |
| 5 |
=861+(
| 7 |
| 5 |
| 3 |
| 5 |
=861+2
=863
(2)
| 9 |
| 25 |
| 16 |
| 25 |
=
| 9 |
| 25 |
| 1 |
| 6 |
| 1 |
| 6 |
| 16 |
| 25 |
=(
| 9 |
| 25 |
| 16 |
| 25 |
| 1 |
| 6 |
=1×
| 1 |
| 6 |
=
| 1 |
| 6 |
(3)48×(
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 3 |
=48×
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 3 |
=12+8-16
=4
(4)95.6×37%+4.4×0.37
=95.6×0.37+4.4×0.37
=(95.6+4.4)×0.37
=100×0.37
=37
点评:注意分析数据,采用合适的简便方法计算.
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