A window has 4 glass panels each. A house has 6 double windows downstairs and 8 single windows upstairs. How many glass panels are there in the whole house?
There are 6 x 2 = <T>multiply(6, 2)=12 windows downstairs
There are 12 + 8 = <T>add(12, 8)=20 windows in the whole house
There are 20 x 4 = <T>multiply(20, 4)=80 glass panels in the whole house
