Area model to represent the expression for 22 x 20

22·20 you would use the sum it up method

answer: ouch. thats difficult

step-by-step explanation:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it