Rachel's answer to Ashika Ashokkumar's Primary 4 Maths Singapore question.

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Rachel
Rachel's answer
15 answers (A Helpful Person)
Use models. Bala as 1u. David has 285 more than Bala. Repeat David's model 3 times for Jack. Use total minus all the 285. You'll get 5 equal units. Find 1 unit.