1.23×2.45-1.22×2.46用简便运算怎么算
3个回答
展开全部
=（1.22+1)x2.45-1.22×2.46
=1.22×2.45-1.22×2.46+2.45
=1.22×(2.45-2.46)+2.45
=-1.22×0.01+2.45
=2.45-0.0122
=2.4278
=1.22×2.45-1.22×2.46+2.45
=1.22×(2.45-2.46)+2.45
=-1.22×0.01+2.45
=2.45-0.0122
=2.4278
追答
=（1.22+0.01)x2.45-1.22×2.46
=1.22×2.45-1.22×2.46+0.0245
=1.22×(2.45-2.46)+0.0245
=-1.22×0.01+0.0245
=0.0245-0.0122
=0.0123
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展开全部
1.23×2.45-1.22×2.46
=（1.22+0.01）×2.45-1.22×(2.45+0.01)
=1.22×2.45+0.01×2.45-1.22×2.45-1.22×0.01
=0.01×2.45-1.22×0.01
=0.01×(2.45-1.22)
=0.01×1.23
=0.0123
=（1.22+0.01）×2.45-1.22×(2.45+0.01)
=1.22×2.45+0.01×2.45-1.22×2.45-1.22×0.01
=0.01×2.45-1.22×0.01
=0.01×(2.45-1.22)
=0.01×1.23
=0.0123
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展开全部
1.23×2.45-1.22×2.46
=1.23x2.45-1.22x(2.45+0.01)
=1.23x2.45-1.22x2.45-1.22x0.01
=(1.23-1.22)x2.45-1.22x0.01
=0.01x2.45-1.22x0.01
=(2.45-1.22)x0.01
=1.23x0.01
=0.0123
谢谢，请采纳
=1.23x2.45-1.22x(2.45+0.01)
=1.23x2.45-1.22x2.45-1.22x0.01
=(1.23-1.22)x2.45-1.22x0.01
=0.01x2.45-1.22x0.01
=(2.45-1.22)x0.01
=1.23x0.01
=0.0123
谢谢，请采纳
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