Sally and hans started counting at the same time. sally counted on by tens from 300.hans counted back by hundreds. after six counts, they had reached the same number. what numberdid hans start counting from? draw a diagram or act it out.

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.

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