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)□﹣ =△□= = .
= ÷ = %= 成= : .
==8÷ = (填小数)
= ÷32== ( 填小数)
== :1.6= %
× =÷ = %= :0.125=四成.