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第75頁

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=(112233-112.233)÷[(112233-112.233)×2]
=(112233-112.233)÷(112233-112.233)÷2
=1÷2
=0.5
=(11×13×17×19)×(0.2×0.5×5×2)
=46189×1
=46189
=(1000 1)+(100-0.1)+(10-0.01)+(1-0.001)
=1111-1-0.1-0.01-0.001
=1110-0.111
=1109.889
=34×2.5+34×2.3+34×4.2
=34×(2.5+2.3+4.2)
=34×9
=306
=20.19×(20.19-19.99)-19.99×(20.19-19.99)
=20.19×0.2-19.99×0.2
=(20.19-19.99)×0.2
=0.2×0.2
=0.04
=3.79×0.038+0.159×6.21+3.79×0.121
=3.79×(0.038+0.121)+0.159×6.21
=3.79×0.159+0.159×6.21
=(3.79+6.21)×0.159
=10×0.159
=1.59
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