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简介:
5.79×0.99
=5.79×(1-0.01)
=5.79×1-5.79×0.01
=5.79-0.0579
=5.7321
1.01×0.86
=(1+0.01)×0.86
=1×0.86+0.01×0.86
=0.86+0.0086
=0.8686
19.8÷0.5-9.8×2
=19.8×2-9.8×2
=(19.8-9.8)×2
=10×2
=20
8.6×0.45+4.5×0.14
=8.6×0.45+0.45×1.4
=(8.6+1.4)×0.45
=10×0.45
=4.5
8.57÷5-3.57÷5
=(8.57-3.57)÷5
=5÷5
=1
5.46×101-5.46
=5.46×(101-1)
=5.46×100
=546