m+5=n+m×=n×a
m-x=n-m÷=n÷2.5
①a-=b-c
②a÷ =b÷9
①x÷1.44=0.4
②3.85+1.5x=6.1
③12x-9x=8.7
④(100-3x)÷2=8
14.8+13.5= 0.91÷0.7= 0.125×8= 700÷1000= 0.2b+1.8b=
3.4×0.03= 30÷0.1= 1.63+3.7= 0.52 = 2.7+2.7×0=