计算下面各题,能用简便方法的要用简便方法计算. 1.25×32×2.5 7.54-0.9×6-2.36 10.1×3.4 8
计算下面各题,能用简便方法的要用简便方法计算.1.25×32×2.57.54-0.9×6-2.3610.1×3.48÷0.9÷4.17.28+27.2÷43.6×5.2+...
计算下面各题,能用简便方法的要用简便方法计算. 1.25×32×2.5 7.54-0.9×6-2.36 10.1×3.4 8÷0.9÷4.1 7.28+27.2÷4 3.6×5.2+4.8×3.6.
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(1)1.25×32×2.5, =1.25×8×4×2.5, =(1.25×8)×(4×2.5), =10×10, =100; (2)7.54-0.9×6-2.36, =7.54-5.4-2.36, =2.41-2.36, =0.05; (3)10.1×3.4, =(10+0.1)×3.4, =34+0.34, =34.34; (4)8÷0.9÷4.1, =8÷(0.9×4.1), =8÷3.69, =
(5)7.28+27.2÷4, =7.28+6.8, =14.08; (6)3.6×5.2+4.8×3.6, =3.6×(5.2+4.8), =3.6×10, =36. |
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