Topic 2: Add and Subtract Decimals.

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Across
  1. 3. the number that gets added to another number
  2. 5. when adding three or more numbers, the sum will remain the same regardless of how the numbers are grouped using parentheses
  3. 9. two numbers that have the same value
  4. 10. an addition expression containing two numbers, the order of the numbers can be switched without changing the answer, or sum
Down
  1. 1. pairs of mathematical manipulations in which one operation undoes the action of the other
  2. 2. a step-by-step procedure that can be used to solve computations or other mathematical problems
  3. 4. a strategy where you adjust one number to make it simpler and then balance it by changing another number
  4. 6. making a number simpler while keeping its value close to what it was
  5. 7. the numbers that are easy to add, subtract, multiply, or divide mentally
  6. 8. the result you get when you subtract one number from the other