Tính: a) ( -2/5 + 3/8) : 2/5 + ( -1/ 5 + 4/8) : 2/5
Giải thích
a) −25+38:25+−15+48:25 = −25+38.52+−15+48.52=−25+38+−15+48.52
= −25+−15+38+48.52=−35+78.52= −2440+3540.52=1140.52=5580=1116
a) −25+38:25+−15+48:25 = −25+38.52+−15+48.52=−25+38+−15+48.52
= −25+−15+38+48.52=−35+78.52= −2440+3540.52=1140.52=5580=1116