Answer:
10 quarters
Explanation:
The number of quarter in 2 1/2 ÷ 1/4
= 5/2 ÷ 1/4
= 5/2 × 4/1
= 20/2
= 10
2 1/2= 10 quarters
1 whole has 4 quarters
2 whole have 4*2= 8 quarters
Half has 2 quarters
2 and half have 8+2 = 10 quarters
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