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Grade 1 - Mathematics
3.7 Missing Operand

Method:

  • If the result is a number is greater than the numbers on either side of the operand it is addition.
  • If the result is a number less the number on the left side of the operand, it is subtraction.
  • If the result is 0, the operand is subtraction.
  • If the result is equal to the number on the left side of the operand, the operand is addition.

Example:
Find the missing operand:
12 ? 8 = 20
Here the result 20 is a number that is greater than the 12 and 8. Therefore the operand is addition.
Answer: +

Example:
12 ? 3 = 9
Here the result is a number less the number on the left side of the operand, it is subtraction.
Answer: -

Example:
12 ? 12 = 0
Here the result is 0, therefore the operand is subtraction.
Answer: -

Example:
12 ? 0 = 12
If the result is equal to the number on the left side of the operand, it is addition.
Answer: +


Directions: Answer the following questions. Also write at least ten examples of your own.
Q 1: Find the missing operand.

+
-

Q 2: Find the missing operand.

-
+

Q 3: Find the missing operand.

-
+

Q 4: Find the missing operand.

+
-

Q 5: Find the missing operand.

-
+

Q 6: Find the missing operand.

+
-

Q 7: Find the missing operand.

-
+

Q 8: Find the missing operand.

+
-

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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