①72-45÷5
②68-19+27
③100-(55-17)
④57-7×4
⑤(89-57)÷8
⑥8+16÷4
①6+3×9
②(42+14)÷7
③2×9÷3
④65-30÷5
⑤76-(28+19)
⑥72÷8÷3
①73-26+35
②48÷8×7
③63÷(44-37)
①36×()
②1.3×37.5%+2.7×
③ [()]
④13÷()×