题目内容
用简便方法计算.
| 125×(6×8)×9 | 54×101 | 24×7-24×7 |
| 99×26+26 | 48×101-48 | 125×(8+20) |
①125×(6×8)×9
=(125×8)×(6×9)
=1000×54
=54000
②54×101
=54×(100+1)
=5400+54
=5454
③24×7-24×7
=24×(7-7)
=24×0
=0
④99×26+26
=(99+1)×26
=100×26
=2600
⑤48×101-48
=48×(101-1)
=48×100
=4800
⑥125×(8+20)
=125×8+125×20
=1000+2500
=3500
=(125×8)×(6×9)
=1000×54
=54000
②54×101
=54×(100+1)
=5400+54
=5454
③24×7-24×7
=24×(7-7)
=24×0
=0
④99×26+26
=(99+1)×26
=100×26
=2600
⑤48×101-48
=48×(101-1)
=48×100
=4800
⑥125×(8+20)
=125×8+125×20
=1000+2500
=3500
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