求未知数x。(1)5(x﹣3)=4.5 (2)x:3.6=:
看看谁算得准。9-4= 9+1= 9-6=8+1= 7+2= 8-7=
看看谁算得准。8-5= 9-4= 9+1=4+6= 7-3= 8-5=
看看谁算得准。7-4= 7-6= 6-6=8-5= 9-4= 10-1=
算一算。6-3= 6-2= 8+2=7+3= 6-1= 7+1=
算一算。6-5= 7-1= 8+1=9+1= 10-4= 10-2=