# Pre-Algerbra

1. 1/2-2/3
2. -1/6-1/2
3. -1/2divided by 2 1/2

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2. 👎 0
3. 👁 105
1. When you add or subtract fractions, you need the common denominator.

1.
1/2 = 3/6
2/3 = 4/6
3/6 - 4/6 = -1/6

2.
You try this one.

3.
-(1/2) / -(5/2)
-(1/2) * -(2/5) = 2/10 = 1/5

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