题目内容
计算下列各题,能简算的要简算.
|
|
| 25-
|
(1)
×99+
,
=
×(99+1),
=
×100,
=16;
(2)
×7+
×11,
=
×(7+11),
=
×18,
=10;
(3)
×(
-
),
=
×
,
=
;
(4)25-
×
÷
,
=25-
÷
,
=25-18,
=7.
| 4 |
| 25 |
| 4 |
| 25 |
=
| 4 |
| 25 |
=
| 4 |
| 25 |
=16;
(2)
| 5 |
| 9 |
| 5 |
| 9 |
=
| 5 |
| 9 |
=
| 5 |
| 9 |
=10;
(3)
| 3 |
| 4 |
| 17 |
| 18 |
| 5 |
| 9 |
=
| 3 |
| 4 |
| 7 |
| 18 |
=
| 7 |
| 24 |
(4)25-
| 8 |
| 9 |
| 3 |
| 4 |
| 1 |
| 27 |
=25-
| 2 |
| 3 |
| 1 |
| 27 |
=25-18,
=7.
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