Graham mixes up some mint green paint for his bathroom. He mixes 2 1/5 litres of white paint with 3 1/3 of green paint and 1/2 litre of blue paint. How many litres of mint green paint had Graham made altogether?
2+1/5+3+1/3+1/2
2+3+15+13+12
The lowest common denominator is 5*3*2=30
2+3+1∗3∗35∗3∗2+1∗2∗53∗2∗5+1∗3∗52∗3∗5=5+930+1030+1530=5+9+10+1530=5+3430=5+30+430=5+3030+430=5+1+215=6215
Graham mixes up some mint green paint for his bathroom. He mixes 2 1/5 litres of white paint with 3 1/3 of green paint and 1/2 litre of blue paint. How many litres of mint green paint had Graham made altogether?
215+313+12 $$=2+3+15+13+12 $$=5+15+13+12 $$=5+1∗3∗25∗3∗2+1∗5∗23∗5∗2+1∗5∗32∗5∗3 $$=5+65∗3∗2+103∗5∗2+152∗5∗3 $$=5+6+10+155∗3∗2 $$=5+30+130 $$=5+3030+130 $$=5+1+130 $$=6+130 $$=6130