23.2×0.90.9 1×0.991 72×4.572
5.37×1.15.37 0×1.81.8 8.9×1.189×0.11
6.36.300 780克0.78千克 0.99×2.983 2.8×1.62.8
642÷6= 0.9×99+0.9= 1.25×80= 2.5÷0.01=
÷ = 2﹣ ﹣ = 3﹣ ﹣ = ( ÷ )×30=