0.284÷0.20.284 9.36÷1.049.36×1.04
2.8×1.012.8 7.2×5.454×0.72 a÷0.01a×100(a>0)
1.02×0.980.98 2.75×6.32.75×6.4
35235×35 9.36÷1.019.36:0.99
想一想,按这样排下去,第8个点阵共有个点。
①
②6.875﹣
③372÷25÷0.4
④77×