计算下面各题,能简算的要简算.0.89×100.1146.5-(23+46.5)10÷0.
计算下面各题,能简算的要简算.0.89×100.1146.5-(23+46.5)10÷0.2÷2.564×4.5+36×4.50.125×32×2.51.25×3.2×0...
计算下面各题,能简算的要简算.0.89×100.1146.5-(23+46.5)10÷0.2÷2.564×4.5+36×4.50.125×32×2.51.25×3.2×0.8.
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(1)0.89×100.1
=0.89×(100+0.1)
=0.89×100+0.89×0.1
=89+0.089
=89.089
(2)146.5-(23+46.5)
=146.5-46.5=23
=100-23
=77
(3)10÷0.2÷2.5
=10÷(0.2×2.5)
=100÷0.5
=200
(4)64×4.5+36×4.5
=(64+36)×4.5
=100×4.5
=450
(5)0.125×32×2.5
=(0.125×8)×(4×2.5)
=1×10
=10
(6)1.25×3.2×0.8
=(1.25×0.8)×3.2
=1×3.2
=3.2
=0.89×(100+0.1)
=0.89×100+0.89×0.1
=89+0.089
=89.089
(2)146.5-(23+46.5)
=146.5-46.5=23
=100-23
=77
(3)10÷0.2÷2.5
=10÷(0.2×2.5)
=100÷0.5
=200
(4)64×4.5+36×4.5
=(64+36)×4.5
=100×4.5
=450
(5)0.125×32×2.5
=(0.125×8)×(4×2.5)
=1×10
=10
(6)1.25×3.2×0.8
=(1.25×0.8)×3.2
=1×3.2
=3.2
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