直接写得数:6.2+2.8= 7.82+2.18= 8﹣3.2= 7.7﹣7=0.09×100= 12.76﹣1.6= 0.98﹣0.09= 0+7.5=3.4+4= 28÷10= 25+75﹣25+75= 4000÷125÷8=65﹣17﹣43= (12.3+7.9)×0= (7.9﹣7.9)÷5= 50﹣20÷5=
3÷8═= ÷24= %= :56.
3:4= :8=9: == %
3÷ == :12=七成五= %
÷10==9: == :40.
18: = :20== ÷40=1.2.