a 12+13+14=25+14=19 b 13+70+34=83+34=117
a 12+13+14=25+14=19 b 13+70+34=83+34=117
a 12+13+14=25+14=19 b 13+70+34=83+34=117
a 12+13+14=25+14=19 b 13+70+34=83+34=117
tính
a)12+13+14
= 25 + 14
= 39
b)13+70+34
= 82 + 34
= 116
ai tk mk mk tk lại !!!
thank you very much !!!