题目内容
脱式计算,能简算的要简算
| 7.5×
| ||||||||||||
| 24÷(
|
(1)
÷
×
,
=
×
×
,
=
;
(2)7.5×
+7.5×
,
=7.5×(
+
),
=7.5×1,
=7.5;
(3)
+
×
-
,
=
+
-
,
=
-
,
=
;
(4)24÷(
÷
),
=24÷(
×
),
=24÷
,
=24×
,
=28.8.
| 3 |
| 7 |
| 5 |
| 7 |
| 7 |
| 15 |
=
| 3 |
| 7 |
| 7 |
| 5 |
| 7 |
| 15 |
=
| 7 |
| 25 |
(2)7.5×
| 2 |
| 3 |
| 1 |
| 3 |
=7.5×(
| 1 |
| 3 |
| 2 |
| 3 |
=7.5×1,
=7.5;
(3)
| 2 |
| 7 |
| 5 |
| 7 |
| 1 |
| 5 |
| 1 |
| 14 |
=
| 2 |
| 7 |
| 1 |
| 7 |
| 1 |
| 14 |
=
| 6 |
| 14 |
| 1 |
| 14 |
=
| 5 |
| 14 |
(4)24÷(
| 5 |
| 9 |
| 2 |
| 3 |
=24÷(
| 5 |
| 9 |
| 3 |
| 2 |
=24÷
| 5 |
| 6 |
=24×
| 6 |
| 5 |
=28.8.
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