题目内容
简便计算.
+
+
1.25×8.8
2.5×37+6.3×25.
| 7 |
| 4 |
| 3 |
| 7 |
| 1 |
| 4 |
1.25×8.8
2.5×37+6.3×25.
(1)
+
+
,
=(
+
)+
,
=2+
,
=2
;
(2)1.25×8.8,
=1.25×(8+0.8),
=1.25×8+1.25×0.8,
=10+1,
=11;
(3)2.5×37+6.3×25,
=2.5×37+63×2.5,
=(37+63)×2.5,
=100×2.5,
=250.
| 7 |
| 4 |
| 3 |
| 7 |
| 1 |
| 4 |
=(
| 7 |
| 4 |
| 1 |
| 4 |
| 3 |
| 7 |
=2+
| 3 |
| 7 |
=2
| 3 |
| 7 |
(2)1.25×8.8,
=1.25×(8+0.8),
=1.25×8+1.25×0.8,
=10+1,
=11;
(3)2.5×37+6.3×25,
=2.5×37+63×2.5,
=(37+63)×2.5,
=100×2.5,
=250.
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