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Worksheet

Mental Math: Addition Strategies

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Show your work for each problem.

  1. 1.
    Which strategy is best for ?
    1. a)Make a ten:
    2. b)Use a calculator
    3. c)Break apart:
    4. d)Count on fingers
  2. 2.
    Use make a ten: What is ?
  3. 3.
    Use doubles: What is ?
  4. 4.
    Use near doubles: What is ?
  5. 5.
    Which pair of numbers makes a ten?
    1. a) and
    2. b) and
    3. c) and
    4. d) and
  6. 6.
    Use break apart to solve
  7. 7.
    Use friendly numbers: What is ?
  8. 8.
    Use friendly numbers to solve
  9. 9.
    A movie is 95 minutes long. If there are 15 minutes of previews, what is the total time?
    1. a)100 minutes
    2. b)110 minutes
    3. c)115 minutes
    4. d)105 minutes
  10. 10.
    Add from left to right:
  11. 11.
    You have 37 euros and earn 28 more. How much do you have now?
  12. 12.
    Use left-to-right to solve
  13. 13.
    What is ? Use friendly numbers.
  14. 14.
    In a game, you scored 78, 45, and 22 points in three rounds. What is your total?
    1. a)140 points
    2. b)145 points
    3. c)135 points
    4. d)155 points
  15. 15.
    Chain addition: Solve using smart grouping
  16. 16.
    Calculate mentally:
Interactive lesson with step-by-step solutions and more practice (free): mathorio.com/en/learn/arithmetic/basic-operations/mental-math-addition