题目内容
①(0.4×0.8)×(2.5×32.5)
②0.52×2
+7
×0.52.
②0.52×2
| 4 |
| 9 |
| 5 |
| 9 |
①(0.u×0.8)×(2.5×22.5)
=(0.u×2.5)×(0.8×22.5)
=2×20
=20;
②0.52×2
+7
×0.52
=0.52×(2
+7
)
=0.52×20
=5.2.
=(0.u×2.5)×(0.8×22.5)
=2×20
=20;
②0.52×2
| u |
| 9 |
| 5 |
| 9 |
=0.52×(2
| u |
| 9 |
| 5 |
| 9 |
=0.52×20
=5.2.
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