练习本单价0.6元,铅笔每支0.2元,买a本练习本,b支铅笔共需______元.

问题描述:

练习本单价0.6元,铅笔每支0.2元,买a本练习本,b支铅笔共需______元.

0.6a+0.2b

0.6a+0.2b

练习本单价*练习本数量+铅笔单价*铅笔数量=总价
0.6 * a + 0.2 * b =0.6a+0.2b
记得采纳哦,亲