题目内容
(1)(48-3÷0.25)×
(2)10.5×20%-4.8×25%
(3)
×
÷(1÷
) (4)728+900÷18×8.4.
| 4 |
| 9 |
(3)
| 1 |
| 3 |
| 9 |
| 20 |
| 1 |
| 2 |
(1)(48-3÷0.25)×
,
=(48-12)×
,
=36×
,
=16;
(2)10.5×20%-4.8×25%,
=10.5×
-4.8×
,
=2.1-1.2,
=0.9;
(3)
×
÷(1÷
),
=
÷(1×2),
=
÷2,
=
×
,
=
;
(4)728+900÷18×8.4,
=728+50×8.4,
=728+420,
=1148.
| 4 |
| 9 |
=(48-12)×
| 4 |
| 9 |
=36×
| 4 |
| 9 |
=16;
(2)10.5×20%-4.8×25%,
=10.5×
| 1 |
| 5 |
| 1 |
| 4 |
=2.1-1.2,
=0.9;
(3)
| 1 |
| 3 |
| 9 |
| 20 |
| 1 |
| 2 |
=
| 3 |
| 20 |
=
| 3 |
| 20 |
=
| 3 |
| 20 |
| 1 |
| 2 |
=
| 3 |
| 40 |
(4)728+900÷18×8.4,
=728+50×8.4,
=728+420,
=1148.
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