1.25x3.43-1.25-1.43x1.25 1.6x16+0.4x36
參考答案:1.25x3.43-1.25-1.43x1.25
=1.25x(3.43-1-1.43)
=1.25x1
=1.25
1.6x16+0.4x36
=1.6x16+1.6x9
=0.4x4x(16+9)
=0.4x4x25
=0.4x100
=40
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1.25x3.43-1.25-1.43x1.25 1.6x16+0.4x36
參考答案:1.25x3.43-1.25-1.43x1.25
=1.25x(3.43-1-1.43)
=1.25x1
=1.25
1.6x16+0.4x36
=1.6x16+1.6x9
=0.4x4x(16+9)
=0.4x4x25
=0.4x100
=40