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②
③
16.8﹣8=
=
0.35×99+0.35=
0.1÷0.01= = = 32×2=
= 2+98%= 3.14× =
+×+ 7.5×+2.5÷
2.4×(1.01-0.88)÷0.52 1.2+〔(0.5-)×1.8〕
:=:x 0.8:40=x:80 :x = 30:120 =