Julia understands that if 4 coins are added to 5 coins to equal 9 coins, then 4 coins subtracted from 9 coins equals 5 coins. This indicates that Julia has reached.
Added by Anthony E.
Step 1
She knows that adding 4 coins to 5 coins equals 9 coins, and subtracting 4 coins from 9 coins equals 5 coins. Show more…
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