题目内容
用你喜欢的方法脱式计算.
(1)128+750÷25×18
(2)(800×
-360)÷40
(3)
×
+
×
(4)[1-(
-
)]×
.
(1)128+750÷25×18
(2)(800×
| 4 |
| 5 |
(3)
| 13 |
| 8 |
| 3 |
| 7 |
| 3 |
| 8 |
| 3 |
| 7 |
(4)[1-(
| 1 |
| 2 |
| 1 |
| 4 |
| 2 |
| 3 |
(1)128+750÷25×18
=128+30×18,
=128+540,
=668;
(2)(800×
-360)÷40
=(640-360)÷40,
=280÷40,
=7;
(3)
×
+
×
=(
+
)×
,
=2×
,
=
;
(4)[1-(
-
)]×
=[1-
]×
,
=
×
,
=
.
=128+30×18,
=128+540,
=668;
(2)(800×
| 4 |
| 5 |
=(640-360)÷40,
=280÷40,
=7;
(3)
| 13 |
| 8 |
| 3 |
| 7 |
| 3 |
| 8 |
| 3 |
| 7 |
=(
| 13 |
| 8 |
| 3 |
| 8 |
| 3 |
| 7 |
=2×
| 3 |
| 7 |
=
| 6 |
| 7 |
(4)[1-(
| 1 |
| 2 |
| 1 |
| 4 |
| 2 |
| 3 |
=[1-
| 1 |
| 4 |
| 2 |
| 3 |
=
| 3 |
| 4 |
| 2 |
| 3 |
=
| 1 |
| 2 |
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