4.6﹣1.02= + = ÷2= ×3=
1﹣ - = 14÷21= 1.6÷10%= × ÷ × =
列式:
× = 4÷0.8= 3﹣ = 0.23=
÷ = 786﹣298= 25×0.7×4= 8.7+7=
( ﹣0.375)÷ = × ÷ × =
5%×10= 200×80%= 20÷20%= 1﹣75%= 2+150%=
15÷30%= 15×30%= 42÷60%= 90×4.5%= 16÷50%=
9.7+4.2= 1.04﹣0.47= 0.25×0.8= 630+2.1=
+ = = = =
=+ , =+ , =+……那么,在算式=+中,a=,b=。