0.21:0.49化简
三分之五比0.21 1.35比0.75 化简,比值
化简.根号内0.01×0.49.根号5/8
0.49*5.1+4.9*0.49 简便运算
2.5*0.4+0.21*3
(1+0.21+0.32)*(0.21+0.32+0.43)-(1+0.21+0.32+0.43)*(0.21+0.32
0.21除以35
(1+0.21+0.32)*(0.21+0.32+0.43)-(1+0.21+0.32+0.43)*(0.21+0.32
计算(1+0.21+0.32)x(0.21+0.32+0.43)-(1+0.21+0.32+0.43)x(0.21+0.
巧算0.39×0.21
0.49 tons还是ton
负的0.49平方根
0.49p²-144