①139×﹣137× ②73××(15×)× ④88.76×4﹣8.76÷0.25⑤÷(×) ⑥4.6×+8.4÷﹣×5.
158+97+42.
简便计算 ①2.8×0.5+0.5×27.2②3.56+6.1+6.44③17.67﹣2.77﹣2.23④11÷2.5÷0.4.
7.08×1.3+8.7×7.08.
怎样算简便就怎样算.;4﹣﹣; ×58+42÷8; 36×(+﹣);(15﹣14×)×;÷﹣÷.
0.23×102 4×1.76×0.25.