□○□=□(个)
□○□=□(只)
0.25×3.2= + = 0.7÷0.01= 9.04+0.6=
-0.375= 13÷91= 10÷20%= 0.81× =
2÷24= ×= 16×40%=
112= 51×99≈ 3.5×2÷3.5×5=