题目内容
| 脱式计算(怎样简算怎样算): (
| 70.5-4.5+9.8 | (
| 7.3×99+7.3. |
(1)(
+
)×48
=
×48+
×48,
=16+6,
=22;
(2)70.5-4.5+9.8
=66+9.8,
=75.8;
(3)(
-
)×
=
×
,
=
;
(4)7.3×99+7.3.
=(99+1)×7.3,
=100×7.3,
=730.
| 1 |
| 3 |
| 1 |
| 8 |
=
| 1 |
| 3 |
| 1 |
| 8 |
=16+6,
=22;
(2)70.5-4.5+9.8
=66+9.8,
=75.8;
(3)(
| 3 |
| 5 |
| 1 |
| 4 |
| 3 |
| 7 |
=
| 7 |
| 20 |
| 3 |
| 7 |
=
| 3 |
| 20 |
(4)7.3×99+7.3.
=(99+1)×7.3,
=100×7.3,
=730.
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