24.06+0.4= += 5﹣+= 2.5×44=
15÷1%= 2.4×= 4×÷4×= 30÷62.5%=
2380﹣450÷18×48 2.3+3.91÷(22﹣19.7) ÷[(+)×]
+0.625= ×= 24÷40%= 7.2÷0.9÷0.8=
480÷60= 3.72+6.28= +×1=
235+99= ﹣= 12×÷12×=
×4=
3÷40%=
÷=
÷×0=
∶=
-0.25=
0.78×=
24.8-4.8÷=
=
1﹣0.01=
1+2.5%=
3.3﹣=
+= += +=
×= ×= ×=
我的发现: