2.5+6=
0.12=
1-=
+=
1.5×20%=
9﹣0.99= 24÷=
2022÷2021= -=
0.25×28= 500×1%= 0.81× = 0.32-0.22=
8×4÷8×4= 1÷3× = 0.8÷0.01= 98÷22=
①
②
③
④
①40×[2-(+)]
②48×(+-)
③(2.74+5.4÷2.7)×0.3
④0.25×1.25×32
⑤507÷3+12.5×11
⑥2011×