7+45=
27+7=
37+63=
70-23=
54-45=
14-9=
50-26=
27+32=
77-70=
65-42=
①2.4÷×
②(+﹣)×36
③×99
④29.3﹣12.6﹣7.4
⑤5.9×8.5﹣49×0.85
⑥×[6÷(﹣)]