题目内容
| 简便计算。 | ||||||
|
| (1) = =11.2 |
(2) =3.4- =2.4 |
(3)2.5×32×12.5 =2.5×4×8×12.5 =(2.5×4)×(8×12.5) =10×100 =1000 |
| (4)3.4×5.6+5.6×6.6 =5.6×10 =56 |
(5)10.2 ×43 =(10+0.2)×43 =430+8.6 =438.6 |
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题目内容
| 简便计算。 | ||||||
|
| (1) = =11.2 |
(2) =3.4- =2.4 |
(3)2.5×32×12.5 =2.5×4×8×12.5 =(2.5×4)×(8×12.5) =10×100 =1000 |
| (4)3.4×5.6+5.6×6.6 =5.6×10 =56 |
(5)10.2 ×43 =(10+0.2)×43 =430+8.6 =438.6 |