0.05×200=
0.6×1.2=
0.18×0.5=
1.8×0.04=
2.8×0.5=
0.25×8.6×4=
1.4×0.3=
1.25×0.8×3.6=
20×30 0.2×0.3
=(2×10)×(3×10) =(2×0.1)×(3×0.1)
=(2×3)×(10×10) =(2×3)×(0.1×0.1)
=6×100 =6×0.01
=600 =0.06
3.2÷0.01= 2.2×9.9= 305-199=
2.05×4= 8×12.5%=