题目内容
| 脱式计算(后两题用简便方法算). 24×[(725-230)÷5] | 72÷36×(82+28) | 25×64×125 | 102×73-2×73. |
(1)24×[(725-230)÷5]
=24×[495÷5],
=24×99,
=24×(100-1),
=24×100-24,
=2400-24,
=2376.
(2)72÷36×(82+28)
=2×110,
=220;
(3)25×64×125
=25×4×2×8×125;
=(25×4)×2×(8×125),
=100×2×1000,
=200000;
(4)102×73-2×73
=(102-2)×73,
=100×73,
=7300.
=24×[495÷5],
=24×99,
=24×(100-1),
=24×100-24,
=2400-24,
=2376.
(2)72÷36×(82+28)
=2×110,
=220;
(3)25×64×125
=25×4×2×8×125;
=(25×4)×2×(8×125),
=100×2×1000,
=200000;
(4)102×73-2×73
=(102-2)×73,
=100×73,
=7300.
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