Meaning of the equal sign Knowledge-Based Download PDF

Questions

1. 1.

   In the equation $11 - 4 = 2 + 5$, what relationship does the equal sign establish between the two sides?

   • A) It signals that the calculation on the left side produces the expression on the right side as an answer.
   • B) It commands the reader to subtract first and then add the numbers on the right side.
   • C) It asserts that the value of the expression $11 - 4$ is equal to the value of the expression $2 + 5$.
   • D) It indicates that the total numerical value increases from the left side to the right side.
2. 2.

   Why can the true equation $5 + 9 = 14$ also be correctly written as $14 = 5 + 9$?

   • A) The equal sign indicates a relationship of balance between both sides, meaning the expression on the left has the exact same value as the expression on the right regardless of their positions.
   • B) The equal sign signals that a calculation has ended, meaning the final answer must always be moved to the left side before starting another problem.
   • C) The equal sign changes the addition operation into a subtraction operation whenever the total value is written first.
   • D) The equal sign requires numbers to be written in decreasing order from left to right to maintain mathematical balance.
3. 3.

   Which of the following equations is true?

   • A) $9 + 4 = 13 + 1$
   • B) $15 - 6 = 7 + 3$
   • C) $14 - 5 = 6 + 3$
   • D) $8 + 9 = 17 + 2$
4. 4.

   Which of the following statements correctly explains the meaning of the equal sign ($=$) in a number sentence?

   • A) It indicates that the expressions on both sides have the exact same value.
   • B) It indicates that a calculation must be carried out to find an answer.
   • C) It indicates that the number following it is always the final sum of an addition.
   • D) It indicates that the left side must always contain more numbers than the right side.
5. 5.

   Which number makes the equation $8 + 7 = \Box + 6$ true?

   • A) 15
   • B) 21
   • C) 1
   • D) 9