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First, subtract 20 and 5. Then take that answer and subtract 13 from it. 20-5-13 15-13 2 The answer is 2
26
Subtract 4 each time.
26
The rule is: add 5, subtract 2, add 5, subtract 2, . . . Next number is 24.
First, subtract 20 and 5. Then take that answer and subtract 13 from it. 20-5-13 15-13 2 The answer is 2
22
18
26
13/20 - 3/5 = 13/20 - 12/20 = 1/20
Subtract 4 each time.
26
5
The rule is: add 5, subtract 2, add 5, subtract 2, . . . Next number is 24.
16
7 ft 3 in. You can subtract 2 in from 5 in to get 3 in, then subtract 6 ft from 13 ft to get 7 ft and add the two results to get 7'3".
If the fractions have the same denominator, just add or subtract the numerators. 13/20 - 9/20 = 4/20 2/5 + 1/5 = 3/5