3.96÷0.3=÷3 6.85÷=68.5÷3
18.36÷5.4=÷54 16÷0.8=÷
0.734734……0.735 2÷4 0.4
①3x=2.1
②x+1.2x=17.6
③1.9x–1.4=6.2
④7(x+6.3)=54.6
①
②
③
……