①58+27=
②80-56=
③80-19-37=
④53+28-39=
⑤16+(64-48)=
8×9=
6×8=
4×7=
①65+8
②83-19
③23+65
④64- 18+25
⑤90 -25 – 27
⑥71- (51 -6)