Add across as in the example. Then add downward. Add the sums on the right side and write the answer in the upper triangle. Then add the lower sums and right the
sum in the lower triangle. Do your answers match? Congratulations!
How do I do this

Which of the choices shown could be used to prove that aacp=abcp ?

Which strategy is used by public health to reduce the incidence of food poisoning?

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?