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### Grade 5 - Mathematics1.4 Variables

 Sometimes to solve a problem we have to form a mathematical equation. A letter or a text string is used to denote an unknown quantity while forming an equation. The unknown quantity is called a variable. The equation may be solved to find the value of the variable. Example: a - 5 = 10 While solving an equation, the variables are kept on one side and the numbers are transferred to the other side of the equation. So adding 5 to both sides we get, a - 5 + 5 = 10 + 5 so we get a = 15 Note: If we perform any operation on one side of the equation, the same operation should be performed on the other side of the equation as well. Directions: Find the value of the variable in each question and show your work. Also write at least 10 examples of your own involving the operations: addition and subtraction.
 Q 1: 33 + n = 42Answer: Q 2: n - 21=19Answer: Q 3: 14 + n = 34Answer: Q 4: n - 11= 12Answer: Q 5: n - 8 = 2Answer: Q 6: N = (8 X 2) + 2Answer: Q 7: n + 8= 27Answer: Q 8: n + 3 = 15Answer: Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!