① ②
③
①7.4﹣6.62+20.6﹣13.38
②×+×
③(-+)÷
④2×0.8×12.5×50%
⑤÷(÷+)
⑥×[1÷(+)]
48×25%= 334-199= 12÷0.25= 2018×2018×0=
3-3÷4= 3- = 9-1.67-5.33= 1.8× =
( - )×20= 14× ÷14× =