题目内容
脱式计算.
| 99×87+87 | 18.7-3.375-6.625 | ||||||||||||||
5
|
|
(1)99×87+87,
=(99+1)×87,
=100×87,
=8700;
(2)18.7-3.375-6.625,
=18.7-(3.375+6.625),
=18.7-10,
=8.7;
(3)5
×(
+0.5)÷2
,
=5
×
÷2
,
=6
÷2
,
=3;
(4)
÷[(
-
)÷
],
=
÷[
÷
],
=
÷
,
=
.
=(99+1)×87,
=100×87,
=8700;
(2)18.7-3.375-6.625,
=18.7-(3.375+6.625),
=18.7-10,
=8.7;
(3)5
| 2 |
| 5 |
| 3 |
| 4 |
| 1 |
| 4 |
=5
| 2 |
| 5 |
| 5 |
| 4 |
| 1 |
| 4 |
=6
| 3 |
| 4 |
| 1 |
| 4 |
=3;
(4)
| 4 |
| 15 |
| 5 |
| 7 |
| 3 |
| 14 |
| 3 |
| 4 |
=
| 4 |
| 15 |
| 1 |
| 2 |
| 3 |
| 4 |
=
| 4 |
| 15 |
| 2 |
| 3 |
=
| 2 |
| 5 |
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