①3.5×+5.5×80%+0.8
②(9.88+0.24÷2)×7.6
③36÷[1-()]
④
⑤12.38+5.76-2.38+4.24
①
②4.2×99+4.2
③
②
③0.79×99+0.79
④3.8×97+0.38×30
⑤
⑥(﹣)×9×12
①3248÷16﹣8.4×2.5
②4.8×(+﹣)
③2.5×96
④64.8÷(22.4﹣1.7﹣15.3)
⑤×[14÷(﹣)]
⑥(+)÷×3.6