① × ×3
②87×
③ - ×
④ ÷ ×
⑤3.7× +1.3÷
⑥ ÷(3- - )
①×31
②
③139 ×+137 ×
④÷25
⑤×(150×36)×
⑥
3×+÷3 36×25%+36×
①3.86+6.4+2.14+7.6
②5.2÷0.32﹣0.12
③()×15
④
⑤
①
③