4 + 52 + 10 + 5 = 4 + 25 + 10 + 5 = 44
44 tich cho minh rui minh tich lai cho nha
4+52+10+5=4+25+10+5=4+(5+25)+10=4+(30+10)=4+40=44
4+52+10+5
=4+25+10+5
=29+10+5
=39+5
=44
4 + 52 + 10 + 5
= 4 + 25 + 10 + 5
= 4 + 10 + 25 + 5
= 14 + 30
= 44
4+52+10+5
=4+25+10+5
=29+10+5
=39+5
=44