Question 10 of 34beginner🔧 ApplyNumerical2 marks

You start from Floor +2 and press −3 in the lift. Where will you reach? Write an expression for this movement.

Correct Answer

Given: Starting floor = +2, Movement = −3 (going down 3 floors)

Formula: Starting floor + Movement = Target floor

Substitution: (+2) + (−3)

Calculation: Starting from +2, going down 3 floors takes us to −1

Answer: You will reach Floor −1. Expression: (+2) + (−3) = −1

Note: In the Building of Fun, positive numbers represent floors above ground and negative numbers represent floors below ground.

Exercise: Figure it Out (Section 1) | Q: 1 | (Chapter: Page 4)
For More Understanding

Explanation

Starting from Floor +2 and pressing −3 means going down 3 floors. Using the expression: Starting floor + Movement = Target floor, we get (+2) + (−3) = −1. The chapter explains this through the Building of Fun context where positive numbers represent floors above ground and negative numbers represent floors below ground.

Solution Steps

  1. Step 1: Identify the starting floor: +2

  2. Step 2: Identify the movement: −3 (going down 3 floors)

  3. Step 3: Write the expression: (+2) + (−3)

  4. Step 4: Calculate: Starting from +2, going down 3 floors takes us to −1

  5. Step 5: Final answer: (+2) + (−3) = −1

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