无
*注意事项:
-8-1 - - 0- -0.50.5
÷3= ×15= 2- = 1+2%=
÷ = 5÷ = ×75% = ×4× =
+ × = ×99+99× =
请你先算一算,再比一比,为学校拿个主意:到哪个商家购买更便宜?
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