题目内容
用简便方法计算下面各题.
(
+
)×24=
15
+3.25+4
+2
=
(
| 5 |
| 6 |
| 7 |
| 8 |
15
| 4 |
| 25 |
| 21 |
| 25 |
| 3 |
| 4 |
(1)(
+
)×24
=
×24+
×24
=20+21
=41;
(2)15
+3.25+4
+2
=15
+3
+4
+2
=(15
+4
)+(3
+2
)
=20+6
=26.
| 5 |
| 6 |
| 7 |
| 8 |
=
| 5 |
| 6 |
| 7 |
| 8 |
=20+21
=41;
(2)15
| 4 |
| 25 |
| 21 |
| 25 |
| 3 |
| 4 |
=15
| 4 |
| 25 |
| 1 |
| 4 |
| 21 |
| 25 |
| 3 |
| 4 |
=(15
| 4 |
| 25 |
| 21 |
| 25 |
| 1 |
| 4 |
| 3 |
| 4 |
=20+6
=26.
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