①a×7.3+7.3×b=7.3×
②1.25×m×8=××
3×0.4= 5÷0.1= 1-0.44= 9÷0.3=
1÷0.01= 1.25×0.08= 6x-x= x-0.7x=
a-0.4a= 3a×a= 6a2-4a2= 10x-x+1.8x=
①x÷5.8=3.2
②7×7-3x=40
③5x+6x=99
④40-9x=5
⑤6(x-3)=24
⑥3x-7.68=0.42