1.2x2.5+2.8x2.5简便计算
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1.2x2.5+2.8x2.5简便计算1.2x2.5+2.8x2.5简便计算1.2x2.5+2.8x2.5简便计算1.2x2.5+2.8x2.5=(1.2+2.8)x2.5=4x2.5=10解1.2x
1.2x2.5+2.8x2.5简便计算
1.2x2.5+2.8x2.5简便计算
1.2x2.5+2.8x2.5简便计算
1.2x2.5+2.8x2.5
=(1.2+2.8)x2.5
=4x2.5
=10
解1.2x2.5+2.8x2.5=2.5×(1.2+2.8)=2.5×4=10
1.2x2.5+2.8x2.5
=(1.2+2.8)*2.5
=4*2.5
=10
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