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1.27*1.8+8.2*0.21=(1+0.21)*1.8一8.2x0.21=1.8+1.8X0.21一8.2x0.21=1.8+0.21ⅹ(1.8一8.2)=1.8+0.21Ⅹ(-6.4)=1.8一1.344=0.456
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计算过程:
=(1+0.21)x1.8-8.2x0.21
=1.8+1.8x0.21-8.2x0.21
=1.8+0.21×(1.8-8.2)
=1.8+0.21x(-6.4)
=1.8-1.344
=0.456
=(1+0.21)x1.8-8.2x0.21
=1.8+1.8x0.21-8.2x0.21
=1.8+0.21×(1.8-8.2)
=1.8+0.21x(-6.4)
=1.8-1.344
=0.456
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1.21×1.8+8.2×0.21
=(1+0.21)×1.8+8.2×0.21
=1.8+0.21×1.8+8.2×0.21
=1.8+0.21×(1.8+8.2)
=1.8+0.21×10
=1.8+2.1
=3.9
1.21×1.8+8.2×0.21=3.9
=(1+0.21)×1.8+8.2×0.21
=1.8+0.21×1.8+8.2×0.21
=1.8+0.21×(1.8+8.2)
=1.8+0.21×10
=1.8+2.1
=3.9
1.21×1.8+8.2×0.21=3.9
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1.21×1.8+8.2×0.21
=1.21×1.8+8.2×(1.21-1)
=1.21×1.8+8.2×1.21-8.2
=1.21×(1.8+8.2)-8.2
=1.21×10-8.2
=12.1-8.2
=3.9
=1.21×1.8+8.2×(1.21-1)
=1.21×1.8+8.2×1.21-8.2
=1.21×(1.8+8.2)-8.2
=1.21×10-8.2
=12.1-8.2
=3.9
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1.21×1.8-8.2×0.21
=(1+0.21)×1.8-8.2×0.21
=1.8+0.21×1.8-8.2×0.21
=1.8+0.21×(1.8-8.2)
=1.8+0.21×(-6.4)
=1.8-1.344
=0.456
=(1+0.21)×1.8-8.2×0.21
=1.8+0.21×1.8-8.2×0.21
=1.8+0.21×(1.8-8.2)
=1.8+0.21×(-6.4)
=1.8-1.344
=0.456
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