用乘法分配律就是2.5×6+2.5×5-2.5=2.5×(6+5-1)=2.5×10=25,希望采纳
2.5×6+2.5×5-2.5用乘法分配律计算
2.5×6+2.5×5-2.5
=2.5×(6+5-1)
=2.5×10
=25
2.5×6+2.5×5-2.5用乘法分配律计算怎么算?
2.5×6+2.5×5-2.5
=2.5x(6+5-1)
=2.5x10
=25
2.5×6+2.5×5-2.5
=2.5×(5+1)+2.5×5-2.5
=2.5×5+2.5×1+2.5×5-2.5
=2.5×5+2.5+2.5×5-2.5
=2.5×(5+5)
=2.5×10
=25
2.5(6十5一1)
二2.5ⅹ10
二25