题目内容
| 用你喜欢的方法计算. 125×32×25 | 48÷
| ||||||||
15
| 7.8÷[32×(1-
|
解;(1)125×32×25,
=(125×8)×(25×4),
=1000×100,
=100000;
(2)48÷
+52×
,
=48×
+52×
,
=(48+52)×
,
=100×
,
=
;
(3)15
-6.25+(4
-3
),
=15
+4
-(6.25+3
),
=20-10,
=10;
(4)7.8÷[32×(1-
)+3.6],
=7.8÷[12+3.6],
=7.8÷15.6,
=0.5.
=(125×8)×(25×4),
=1000×100,
=100000;
(2)48÷
| 8 |
| 3 |
| 3 |
| 8 |
=48×
| 3 |
| 8 |
| 3 |
| 8 |
=(48+52)×
| 3 |
| 8 |
=100×
| 3 |
| 8 |
=
| 75 |
| 2 |
(3)15
| 2 |
| 3 |
| 1 |
| 3 |
| 3 |
| 4 |
=15
| 2 |
| 3 |
| 1 |
| 3 |
| 3 |
| 4 |
=20-10,
=10;
(4)7.8÷[32×(1-
| 5 |
| 8 |
=7.8÷[12+3.6],
=7.8÷15.6,
=0.5.
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