题目内容
递等式计算.
| 743-450÷18×25 | 88×125 |
| 519.2÷(24.3×2-4.6) | 126×98+126+63×2. |
(1)743-450÷18×25,
=743-25×25,
=743-625,
=118;
(2)88×125,
=11×8×125,
=11×(8×125),
=11×1000,
=11000;
(3)
×(1÷
-1),
=
×(
-1),
=
×
,
=
;
(4)519.2÷(24.3×2-4.6),
=519.2÷(48.6-4.6),
=519.2÷44,
=11.8;
(5)126×98+126+63×2,
=126×98+126×1+126×1,
=126×(98+1+1),
=126×100,
=126.
=743-25×25,
=743-625,
=118;
(2)88×125,
=11×8×125,
=11×(8×125),
=11×1000,
=11000;
(3)
| 2 |
| 3 |
| 3 |
| 4 |
=
| 2 |
| 3 |
| 4 |
| 3 |
=
| 2 |
| 3 |
| 1 |
| 3 |
=
| 2 |
| 9 |
(4)519.2÷(24.3×2-4.6),
=519.2÷(48.6-4.6),
=519.2÷44,
=11.8;
(5)126×98+126+63×2,
=126×98+126×1+126×1,
=126×(98+1+1),
=126×100,
=126.
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