513+128=
1.5﹣0.7=
0.18÷0.3=
=
2.4÷24%=
187﹣28= 42.7+3= 0.622=
515÷5= 12.5%×8= =
①画线段图
②列式
①
②36×()
③
④
⑤3.24×0.76+3.24×0.24
⑥