①56+52÷4
②(123-45)÷3
③21×8+81÷3
④24×5+27×4
⑤(39+13)×8
⑥168-91÷7
784-118-82
①200-74+ 157
②55+45×6
③256-26×6
④100-48÷6
⑤5×(120-80)
⑥45÷(35÷7)
①0.53×2.5+
②25×0.032×12.5
③ [()×]
④6.83+17.9﹣0.83+32.1
①8×2.5×0.125÷
②(+﹣)×24
③6.5÷×
④(+)×+
⑤4×(﹣)×9
⑥÷7+×