×=-=,÷=48,×500=160,+=510-=,4÷20=,×200=700,-=÷15=,×=,4×=1,+=×99=,420÷35=12,25×12=300,135÷=2703/4+1/4=1,2+4/9=22/9,3-2/3=7/3,3/4-1/2=1/41/6+1/2-1/6=1/2,-(+)=,7/8+3/8=5/43/10+1/5=1/2,4/5-7/10=1/10,2-1/6-1/3=÷17=,+19=,÷=4,×=×=,1÷5=,6÷12=,-=.(1+1/2)(1+1/3)(1+1/4)......(1+1/100)2.(1-1/2)(1-1/3)(1-1/4)......(1-1/100)+2-8+*4/25*-(-)+-+-+-+-2456*-4*×3/+++-9036÷×+*+*×1/*45-×*+/5×5/623.(50-)/×1/*47+-1/*-/7×1/*+*×4/+++-1/*+*×1/-420/-*+30/2+90/--105*+*.(1/2+1/3+1/4)*.(25+4)*-4263/+÷13××-÷×4+×.(+)×-768÷×80-÷-768÷**+275**15/8-1/12*9/+*(-)-45*+--(+)*1/4+23*25/100+--+*-*1/
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