第十五周提优训练：分数加减法计算过关测试2

姓名：_______得分：__________

1、口算。(28)

+ = - = - = + =

+ = 2- = 1- + = - =

+ = 1- = + =

- 1= -= - =

2、脱式计算。(18)

-( - ) + - - +

-( + ) - ( + ) + -

3、能简算的要简算。(45)

+ + + 5- - - +