22×30= 160×60= 60×120=
720÷8= 480÷6= 320÷4=
图1
图2
图3
……
…
= = = =
0.25= 0.76÷0.4= 1.6×12%= 1﹣4÷8=
3.14×11= 5.06+1.2= 0.9×99+0.9= =