题目内容
| 计算下面各题,怎样计算简便就怎样计算. 888+999×888= | 12.5×32×0.25= | ||||||||||||||||||||
3-
|
|
(1)888+999×888
=888×(999+1)
=888×1000
=888000;
(2)12.5×32×0.25
=(12.5×8)×(4×0.25)
=100×10
=1000;
(3)3-
÷
-
=3-(
+
)
=3-1
=2;
(4)
×[
÷(
+
)]
=
×[
÷
]
=
×
=
;
(5)
÷[1-(
-
)]
=
÷[1-
]
=
÷
=
.
=888×(999+1)
=888×1000
=888000;
(2)12.5×32×0.25
=(12.5×8)×(4×0.25)
=100×10
=1000;
(3)3-
| 5 |
| 8 |
| 25 |
| 28 |
| 3 |
| 10 |
=3-(
| 7 |
| 10 |
| 3 |
| 10 |
=3-1
=2;
(4)
| 4 |
| 5 |
| 13 |
| 16 |
| 3 |
| 4 |
| 1 |
| 3 |
=
| 4 |
| 5 |
| 13 |
| 16 |
| 5 |
| 6 |
=
| 4 |
| 5 |
| 39 |
| 40 |
=
| 39 |
| 50 |
(5)
| 7 |
| 15 |
| 4 |
| 5 |
| 2 |
| 3 |
=
| 7 |
| 15 |
| 2 |
| 15 |
=
| 7 |
| 15 |
| 13 |
| 15 |
=
| 7 |
| 13 |
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