15.6×24+156×1.8简便计算?
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15.6×24+156×1.8
=15.6×24+15.6×18
=15.6×(24+18)
=15.6×(40+2)
=15.6×40+15.6×2
=224+31.2
=255.2
=15.6×24+15.6×18
=15.6×(24+18)
=15.6×(40+2)
=15.6×40+15.6×2
=224+31.2
=255.2
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