Question 18 of 18beginner💡 UnderstandShort Answer2 marks

Mala is counting backwards from 20. How many steps will it take to reach 0? Explain why?

Correct Answer

It will take 20 steps to reach 0.

Explanation: Counting backwards from 20 means: 20, 19, 18, 17... down to 1, 0. Each number counts as one step. There are 20 numbers from 20 down to 1, plus one more step to reach 0. When counting backwards from 20 to 0, each decrease by 1 counts as one step. The sequence is: 20→19 (1 step), 19→18 (2 steps), continuing until 1→0 (20 steps total). The distance from 20 to 0 is exactly 20 units, requiring 20 steps.

Step 1: Start at 20. Step 2: Count each step backward: 20 to 19 (1), 19 to 18 (2)... down to 1 to 0 (20). Step 3: Total steps = 20. ∴ It will take 20 steps to reach 0.

Exercise: Let us Talk | Q: C | (Page Page 6)
For More Understanding

Explanation

When counting backwards from 20 to 0, each decrease by 1 counts as one step. The sequence is: 20→19 (1 step), 19→18 (2 steps), continuing until 1→0 (20 steps total). The distance from 20 to 0 is exactly 20 units, requiring 20 steps.

Solution Steps

  1. Step 1: Start at 20

  2. Step 2: Count each step backward: 20 to 19 (1), 19 to 18 (2)... down to 1 to 0 (20)

  3. Step 3: Total steps = 20

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