0.8×=
5.6÷=
11﹣+=
5×0.5÷5×0.5=
7.78+2.2=
73.17÷9.12≈
0.3752=
6.3:( )=0.9
3764,1900,809,9973,5720,495,4890
一定,和成反比例。一定,和成正比例。