×1.2= 0.25+=
÷60%= 40%×=
100×25%=
÷40%=
1-72%=
36%+64%=
80×(1+25%)=
60÷(1-40%)=
45×(1-20%)=
72÷(1+20%)=
×16 24× ÷2.4 ÷
1÷1 ÷15 ÷14 × ÷
0.8÷ 180÷ × × ÷ ×
4×= ÷3= 75%-= 0×= ×=
+= ÷= 1.25×0.8= 1÷30%= 12--=
7×= ×= ×= 2×1= =
×21= 51×= ×25= = ×3=
①0.53×2.5+
②25×0.032×12.5
③ [()×]
④6.83+17.9﹣0.83+32.1
+12
﹣8
0
+10
﹣6
+4
平均每个同学一周零花钱元。