Question

7.2乘0.25加2.8除以4用简便方法计算。

Answer 1

7.2乘0.25加2.8除以4
=7.2*1/4+2.8*1/4 0.25化成分数为1/4 后边除以4就等于乘以4的倒数，即1/4
=（7.2+2.8）*1/4 利用乘法分配律
=10*1/4
=2.5

Answer 2

7.2乘0.25加2.8除以4
=7.2*0.25+2.8*0.25
=0.25*（7.2+2.8）
=0.25*10
=2.5

不懂可追问，有帮助请采纳，谢谢！

Answer 3

7.2乘0.25加2.8除以4
=7.2*0.25+2.8*0.25
=（7.2+2.8）*0.25
=10*0.25
=2.5

Answer 4

　　7.2×0.25+2.8÷4
　　=7.2×0.25+2.8×0.25
　　=（7.2+2.8）×0.25
　　=10×0.25
　　=2.5
　　望采纳

Answer 5

7.2*0.25+2.8*0.25=(7.2+2.8)*0.25=2.5