题目内容
计算:
2÷
×
;
2.25×1.8+17.5×0.18;
30×(
+
-
).
2÷
| 8 |
| 5 |
| 25 |
| 24 |
2.25×1.8+17.5×0.18;
30×(
| 2 |
| 5 |
| 1 |
| 6 |
| 4 |
| 15 |
(1)2÷
×
=2×
×
=
(2)2.25×1.8+17.5×0.18
=2.25×1.8+1.75×1.8
=(2.25+1.75)×1.8
=4×1.8
=7.2
(3)30×(
+
-
)
=30×
+30×
-30×
=12+5-8
=9
| 8 |
| 5 |
| 25 |
| 24 |
=2×
| 5 |
| 8 |
| 25 |
| 24 |
=
| 125 |
| 96 |
(2)2.25×1.8+17.5×0.18
=2.25×1.8+1.75×1.8
=(2.25+1.75)×1.8
=4×1.8
=7.2
(3)30×(
| 2 |
| 5 |
| 1 |
| 6 |
| 4 |
| 15 |
=30×
| 2 |
| 5 |
| 1 |
| 6 |
| 4 |
| 15 |
=12+5-8
=9
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