0.13×5=
60×1.2=
10×2.5=
0.04×0.25=
0.3×0.3=
17×0.5=
17÷0.5=
0.4÷0.4÷0.25=
2x+1.6=12.4 7.6x-7x=3.6
①22.8÷4=
②25.73÷8.3=
③6.43÷0.09≈