Example: 20/17 minus 1 20/17 minus 17/17 3/17
n + 20 - 17 + 13 - n = 20 - 17 + 13 = 3 + 13 = 16
3/20 - 17/100First make the denominators of both fractions equal.3/20(5/5) - 17/100 =15/100 - 17/100Now subtract.15/100 - 17/100 = -2/100 = -1/50
The pattern is subtract 9, add 3. 26-9 = 17 17+3 = 20 20-9 = 11 11+3 = 14 14-9 = 5 So, 5 +3 = 8
3 6 4 8 6 12 10 20 18 36 34 68 Multiply 3 by 2 to get 6 Subtract 2 to get 4 Multiply 4 by 2 to get 8 Subtract 2 to get 6 Multiply 6 by 2 to get 12 Subtract 2 to get 10 .... Got it?
-17
Example: 20/17 minus 1 20/17 minus 17/17 3/17
n + 20 - 17 + 13 - n = 20 - 17 + 13 = 3 + 13 = 16
3/20 - 17/100First make the denominators of both fractions equal.3/20(5/5) - 17/100 =15/100 - 17/100Now subtract.15/100 - 17/100 = -2/100 = -1/50
First find 15% of 20: 20 * 0.15 = 3 OR 20 * (15/100) = 3 Then subtract the 15% from 20: 20 - 3 = 17 Answer: 17.00
The pattern is subtract 9, add 3. 26-9 = 17 17+3 = 20 20-9 = 11 11+3 = 14 14-9 = 5 So, 5 +3 = 8
3 6 4 8 6 12 10 20 18 36 34 68 Multiply 3 by 2 to get 6 Subtract 2 to get 4 Multiply 4 by 2 to get 8 Subtract 2 to get 6 Multiply 6 by 2 to get 12 Subtract 2 to get 10 .... Got it?
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
3m+2=17 First, subtract 2 to get m on one side. 3m+2-2=17-2 3m=15 Divide by 3 to get m by itself. 3m/3=15/3 m=5 m equals 5.
There are infinitely many possible answers:add 8multiply by 2 and subtract 1multiply by 3 and subtract 10multiply by 4 and subtract 19etc are all possible rules.
3 + 17 = 20
3x+2=x-18 subtract 2 from both sides 3x=x-20 subtract 1x from both sides 2x=-20 divide both sides by 2 x=-10