8.8×12.5%×100÷4 80+25%×15×3.2 60×(+75%-50%)
① × ×3
②87×
③ - ×
④ ÷ ×
⑤3.7× +1.3÷
⑥ ÷(3- - )
①3.6﹣2.8+7.4﹣7.2
②1.25×1.6×25
③÷4
④÷[(﹣)×]