题目内容
脱式计算(能简单算的要简算).
|
| ||||||||||||||
| 120×(
|
(1)
÷(
+
)×
,
=
÷
×
,
=
×4×
,
=
;
(2)
÷(
-
),
=
÷
,
=3;
(3)
×37.5%+
÷
,
=
×0.375+
×
,
=
×(0.375+0.625),
=
;
(4)120×(
+
-
),
=120×
+120×
-120×
,
=60+40-90,
=10.
| 1 |
| 5 |
| 1 |
| 12 |
| 1 |
| 6 |
| 1 |
| 3 |
=
| 1 |
| 5 |
| 1 |
| 4 |
| 1 |
| 3 |
=
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 15 |
(2)
| 3 |
| 4 |
| 3 |
| 4 |
| 1 |
| 2 |
=
| 3 |
| 4 |
| 1 |
| 4 |
=3;
(3)
| 5 |
| 6 |
| 5 |
| 6 |
| 8 |
| 5 |
=
| 5 |
| 6 |
| 5 |
| 6 |
| 5 |
| 8 |
=
| 5 |
| 6 |
=
| 5 |
| 6 |
(4)120×(
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 4 |
=120×
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 4 |
=60+40-90,
=10.
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