Jill bought 5 packs of red bouncy balls and 4 packs of yellow bouncy balls. Each package contained 18 bouncy balls. How many more red bouncy balls than yellow bouncy balls did Jill buy?
How many red balls did Jill buy? ** Jill bought 5 packs * 18 red balls = <<5*18=90>>90 red balls.
How many yellow balls did Jill buy? ** Jill bought 4 packs * 18 yellow balls = <<4*18=72>>72 red balls.
How many more red balls than yellow balls did Jill buy? ** Jill had 90 red – 72 yellow = <<90-72=18>>18 more red balls.
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