7.43×3.25+2.57×3.25=
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