巧算0.39×0.21
巧算0.39×0.21
巧算(巧算)
(1+0.25+0.39)X(0.25+0.39+0.87)-(1+0.25+0.39+0.87)X(0.25+0.39
0.39*102 (简便计算)
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.
0.39乘2.9怎么验算,要把0.39放前面
0.39盎司等于多少克
0.39乘2.9=?要列竖式.