Jia Earn Lim's answer to Cookie's Primary 4 Maths Singapore question.
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Hope the diagram helps ;) Notice the difference in the erasers the 2 guys lost is equivalent to 2 units. From there we can calculate 1u represents how many erasers. Benson has 1u + 55 erasers (which he lost at first)
Date Posted:
1 year ago
Thanks !
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