56-(23+7)= 63-5+20= 40+56+4=
37-6+20=
60-4-30=
25+5-9=
42+(12-3)=
58+(26-6)=
84-(32+8)=
28-7+ 5
30-6-8
20-(9-8)
22+(15-7)
43-3+27=
43-(3+27)=
30+11-4=
30+(11-4)=
90-5+7= 77-(20+20)= 83-(60-10)=
25+(90-50)= 49-(14+6)=
36+( )=56 ( )-9=6
①93-(38-30)=
②66-(17+3)
③5+70+10=
④78-50+30=
⑤80-(50-20)=
⑥56-6-40=