4.8÷0.8=6, 3.6×5=18, 0.6÷0.01=60, 4.5+5.5=10,
5.6÷0.8=7, 4×2.5-2.5=7.5, 25×1.3+25×1.7=75, 0.5-0.5×0.5=0.25.