利用加减法之间的关系填写算式.(1)419+363=782782 363=419782 419=363(2)1950﹣1016=9341950 934=10161016 934=1950(3)756+112=868112= 756= (4)□﹣ =△□= = .
0.09:==4÷ = %.
:6=5÷ =50%
1= ÷12==30÷ = %
:8==1.25=50: = %
21÷ == :40= %= (小数)