Unit 6 · Algebra
Total 250 · Yarram 18 More — How Many for Yarram?
Lesson 5 of 12
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About this lesson
Brian and Yarram together have 250 cards. Yarram has 18 more than Brian. How many does Yarram have? This is the classic 'sum and difference' problem — one of the most frequently tested easy OC MR equation types. The fastest method: halve the total (125), then split the difference (±9).
Chapters
0:00Introduction
0:20The Question
0:54Visualising with a Bar Model
1:22Removing the Extra 18 Cards
1:48Splitting the Remainder — Yarram's Total
2:16Confirming the Answer Choice
2:38Correct answer
Question
Brian and Yarram are collecting cards.
Altogether they have 250 cards, but Yarram has 18 more than Brian.
How many cards does Yarram have?
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