7313 5716 2649 25
计算下面各题,能简算的要简算28.49×0.32÷7.44.8×13.5+13.5×5.225.6×1.011.25×0.25×327.8×(1.001÷0.26)×0....
计算下面各题,能简算的要简算 28.49×0.32÷7.4 4.8×13.5+13.5×5.2 25.6×1.01 1.25×0.25×32 7.8×(1.001÷0.26)×0.26 49÷35.
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(1)28.49×0.32÷7.4
=9.1168÷7.4
=1.232
(2)4.8×13.5+13.5×5.2
=(4.8+5.2)×13.5
=10×13.5
=135
(3)25.6×1.01
=25.6×(1+0.01)
=25.6+25.6×0.01
=25.6+0.256
=25.856
(4)1.25×0.25×32
=1.25×0.25×4×8
=(1.25×8)×(0.25×4)
=10×1
=10
(5)7.8×(1.001÷0.26)×0.26
=7.8×1.001÷0.26×0.26
=7.8×(1+0.001)÷(0.26÷0.26)
=7.8+7.8×0.001
=7.8+0.0078
=7.8078
(6)49÷35
=49÷(7×5)
=49÷7÷5
=7÷5
=1.4
=9.1168÷7.4
=1.232
(2)4.8×13.5+13.5×5.2
=(4.8+5.2)×13.5
=10×13.5
=135
(3)25.6×1.01
=25.6×(1+0.01)
=25.6+25.6×0.01
=25.6+0.256
=25.856
(4)1.25×0.25×32
=1.25×0.25×4×8
=(1.25×8)×(0.25×4)
=10×1
=10
(5)7.8×(1.001÷0.26)×0.26
=7.8×1.001÷0.26×0.26
=7.8×(1+0.001)÷(0.26÷0.26)
=7.8+7.8×0.001
=7.8+0.0078
=7.8078
(6)49÷35
=49÷(7×5)
=49÷7÷5
=7÷5
=1.4
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