Question 1107043
The 1 1/2 quilts she sewed in the 3rd month 
must have been 1/3 of remaining quilts after
1st month.
3 times 1 1/2 = 4 1/2 was the remaining number
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The 2nd month was 2/3 of 4 1/2, or 3 quilts
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2 1/2 + 3 + 1 1/2 = 7 quilts in 3 months
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