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-第 1 页六年级数学下册口算题-第 2 页0.640%=1340%=0.650%=0.452%=102:51=4.9:1.4=720:180=0.2540%=1.258%=104.5%=0.76%=30%7=4623%=728%=3.20.08=3.5x+3x=0.711%=123%=100.5=50%9=61%5=0.910.02=11.5+29.6%=1+12%=130%=97%+56%=87%28%=296100=9999+99=319=49.75-0.25=68.8588.858=23.65=73100%=9.8+0.2=15(40+2)=19.8(100-10)=273=6920.5=96030=75%+0.25=4180=65%2=9920=103103=656 1=528 1=3.50.4=0.53=874 3=5.60.01=853 1=0.40.25=3292=3251=435 1=7 51=326 1=0.250.5=2.45=41614 3=103103=656 1=528 1=3.50.4=0.53=