用简便方法计算.
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| 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 |
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a.12×(4+25)[ ]
a. 47+(14×5)(1)35+65=
65+35=
35+65○65+35