题目内容
计算下面各题,能用简便方法计算的要用简便方法计算.
| 936-1365÷13+95 | (
| ||||||||||
|
(
|
(1)936-1365÷13+95,
=936-105+95,
=831+95,
=926;
(2)(
÷
+
)×0.25,
=(
+
)×0.25,
=
×
,
=
;
(3)
×49+87×
,
=13×
+87×
,
=(13+87)×
,
=98;
(4)(
:3-
)×(2-
),
=(
-
)×(2-
),
=
×
,
=
.
=936-105+95,
=831+95,
=926;
(2)(
| 5 |
| 18 |
| 1 |
| 3 |
| 5 |
| 18 |
=(
| 15 |
| 18 |
| 5 |
| 18 |
=
| 20 |
| 18 |
| 1 |
| 4 |
=
| 5 |
| 18 |
(3)
| 13 |
| 50 |
| 49 |
| 50 |
=13×
| 49 |
| 50 |
| 49 |
| 50 |
=(13+87)×
| 49 |
| 50 |
=98;
(4)(
| 3 |
| 4 |
| 1 |
| 10 |
| 2 |
| 3 |
=(
| 1 |
| 4 |
| 1 |
| 10 |
| 2 |
| 3 |
=
| 3 |
| 20 |
| 4 |
| 3 |
=
| 1 |
| 5 |
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