① ÷[( - )× ]
②15.28-3.99-9.01
③ × - ÷4
4.2﹣1.38+5.8﹣3.62
×16.31﹣2.31÷
(+)×4+
÷[(+)×]
① ②
③ ④
①7.4﹣6.62+20.6﹣13.38
②×+×
③(-+)÷
④2×0.8×12.5×50%
⑤÷(÷+)
⑥×[1÷(+)]
①21×16÷14+76
②9- -
③ ×0.8×12.5
④48×( + - )
⑤7.6×9.4- +7.6×1.6
⑥ ×[ ÷(0.4- )]
①2.75×6.2+27.5×0.38
②0.125×32×2.5
③15.72-2.17-1.83+4.28
④
⑤
⑥