36+29= 26-7= 32-6= 5+69= 7+67=
20+30+20= 50-20-10= 61-(47-7)=
29-29+51= 15+85-96= 65-(45-40)=
33+20-40= 78 +(82-80)= 78 + 2 - 60 =
①34+42=
②67-55=
③36+58=
④63-54=
⑤35+27+24=
⑥44+36-28=
⑦72-16-36=