1.6x7.5x1.25
=0.8×2x7.5x1.25
=（0.8x1.25）×（2x7.5）
=1×15
=15
1.6x7.5x1.25
=(1.6x1.25)x7.5
=2x7.5
=15
请采纳！
=(7.5*0.4)*(4x1.25)
=3*5
=15
标签：x7.5
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1.6x7.5x1.25
=0.8×2x7.5x1.25
=（0.8x1.25）×（2x7.5）
=1×15
=15
1.6x7.5x1.25
=(1.6x1.25)x7.5
=2x7.5
=15
请采纳！
=(7.5*0.4)*(4x1.25)
=3*5
=15
标签：x7.5
