题目内容
科学合理的计算.
1.5×8.4+3×0.3+15×10%
30×(
+
-
)
1.5×8.4+3×0.3+15×10%
30×(
| 2 |
| 5 |
| 1 |
| 6 |
| 4 |
| 15 |
(1)1.5×8.4+3×0.3+15×10%,
=1.5×8.4+1.5×0.6+1.5×1,
=1.5×(8.4+0.6+1),
=1.5×10,
=15;
(2)30×(
+
-
),
=30×
+30×
-30×
,
=12+5-8,
=9.
=1.5×8.4+1.5×0.6+1.5×1,
=1.5×(8.4+0.6+1),
=1.5×10,
=15;
(2)30×(
| 2 |
| 5 |
| 1 |
| 6 |
| 4 |
| 15 |
=30×
| 2 |
| 5 |
| 1 |
| 6 |
| 4 |
| 15 |
=12+5-8,
=9.
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