| 用简便方法计算下面各题。 | |||||||||
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| (1)32×46+32×54 =32×(46+54) =3200 | (2)6.46-3.54-2.46 =6.46-2.46-3.54 =0.46 | (3)99×48+48 =48×(99+1) =4800 |
| (4)125×7×5×8 =125×8×7×5 =35000 | (5)1600÷25 =16×100÷25 =64 | (6)4300÷125÷8 =4300÷(125×8) =4.3 |
| (7)25.23-7.85-2.15 =25.23-(7.85+2.15) =15.23 | (8)4.45+9.65+5.55+2.35 =(4.45+5.55)+(9.65+2.35) =22 |