5.3÷1.25.3 0.67÷0.80.67 0.452÷1.44.52÷14
0÷24.624.6 5.46÷61 9.34÷0.28.34÷0.2
0÷5.2 0×3.8 12.6÷0.98 12.6 2.5×1.8 2.5÷1.8
3.5×0.87 3.5 5.6÷10 5.6×0.1 7.9×9.9 80
想一想,按这样排下去,第8个点阵共有个点。