题目
直接写得数.2.1-0.07= 5.5×0.2= 0.99÷9= 0.37+6.3=3.08÷0.1= 61.4÷1000×10= 19.8-0.85-9.15=0.54÷0.09= 12.5×0.008= 78.6×20÷78.6×20=
答案:2.1-0.07=2.03 5.5×0.2=1.1 0.99÷9=0.11 0.37+6.3=6.673.08÷0.1=30.8 61.4÷1000×10=0.614 19.8-0.85-9.15=9.80.54÷0.09=6 12.5×0.008=0.1 78.6×20÷78.6×20=400