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)□﹣ =△□= = .
8: === ÷100= %= (填小数)
==( ):40=( )%=40: .
n÷n=. .
= ÷8=1.25=5: = %
= ÷5=0.8=4: = %= 折.