题目内容
合理、灵活地计算.
| 0.45×14+86×45% |
| (50%-
|
(1)0.45×14+86×45%,
=0.45×(14+86),
=0.45×100,
=45;
(2)
+
÷
,
=
+
,
=
;
(3)(50%-
)×20,
=
×20-
×20,
=10-8,
=2.
=0.45×(14+86),
=0.45×100,
=45;
(2)
| 2 |
| 5 |
| 3 |
| 5 |
| 9 |
| 10 |
=
| 2 |
| 5 |
| 2 |
| 3 |
=
| 16 |
| 15 |
(3)(50%-
| 2 |
| 5 |
=
| 1 |
| 2 |
| 2 |
| 5 |
=10-8,
=2.
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