题目内容
简便计算
| 68-7.5+32 |
|
| 32×97+16×2×3. |
(1)68-7.5+32,
=(68+32)-7.5,
=100-7.5,
=92.5;
(2)
+
+
,
=(
+
)+
,
=1+
,
=1
.
(3)
-(
-
)-
,
=
-
+
-
,
=(
+
)-(
+
),
=1-1,
=0;
(4)32×97+16×2×3,
=32×97+32×3,
=32×(97+3),
=32×100,
=3200.
=(68+32)-7.5,
=100-7.5,
=92.5;
(2)
| 3 |
| 4 |
| 1 |
| 3 |
| 1 |
| 4 |
=(
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 3 |
=1+
| 1 |
| 3 |
=1
| 1 |
| 3 |
(3)
| 8 |
| 9 |
| 1 |
| 4 |
| 1 |
| 9 |
| 3 |
| 4 |
=
| 8 |
| 9 |
| 1 |
| 4 |
| 1 |
| 9 |
| 3 |
| 4 |
=(
| 8 |
| 9 |
| 1 |
| 9 |
| 1 |
| 4 |
| 3 |
| 4 |
=1-1,
=0;
(4)32×97+16×2×3,
=32×97+32×3,
=32×(97+3),
=32×100,
=3200.
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