Skip to content

Class 6 Maths · Chapter 10 · NCERT (fegp110)

The Other Side of Zero: common misconceptions

See the tempting mistake students make in The Other Side of Zero, why it feels right at first glance, and a worked visual example that shows the right idea.

The tempting mistake & worked visual

Which is warmer, −3 °C or −8 °C?

Wrong

−8 °C is warmer because 8 is bigger than 3.

Why it feels right. I compare the digits and ignore the sign.

Right

Temperature increases as you move up a thermometer scale.

Worked example

Move up from −8 °C to −3 °C. That is a rise of 5 °C.
  1. On a thermometer, 0 °C is above −3 °C, which is above −8 °C.
  2. Starting at −8 °C, a rise of 5 °C brings the temperature to −3 °C.

If your child says… (8 concept checks in this chapter)

As you work through The Other Side of Zero, listen for these everyday misunderstandings and use the prompt alongside each one.

If your child says… “Zero doesn't count as an integer.”

Ask together
Which integer labels the middle stair?
What’s true
Zero belongs with the integers even though it is neither positive nor negative.
2. Adding Integers; Back to Zero! See how to teach this step →

If your child says… “Two equal movements always cancel.”

Ask together
Would another move right bring you back to zero?
What’s true
Equal movements cancel only when their directions oppose each other.
3. Comparing numbers using floors See how to teach this step →

If your child says… “Minus two is greater because two is bigger.”

Ask together
Which number sits farther right: −1 or −2?
What’s true
Among negative integers, the number closer to zero is greater.
4. Subtracting Integers See how to teach this step →

If your child says… “Subtracting a negative makes the answer smaller.”

Ask together
From minus one, must you move up or down to reach plus one?
What’s true
Subtracting a negative increases the starting value.
5. Back to the Number Line See how to teach this step →

If your child says… “The movement is three; direction doesn't matter.”

Ask together
Would moving three spaces right reach the same place?
What’s true
Rightward movement is positive, while leftward movement is negative.
6. The Token Model See how to teach this step →

If your child says… “Adding a zero pair increases the total.”

Ask together
What do the two enclosed tokens add to?
What’s true
An opposite pair adds tokens but adds no value.
7. Credits and Debits See how to teach this step →

If your child says… “The change must be positive because money remains.”

Ask together
Will taking coins out increase or decrease the amount?
What’s true
A decrease is a negative change even when the remaining amount is positive.
8. A Hollow Integer Grid See how to teach this step →

If your child says… “I can ignore the minus signs when adding.”

Ask together
Does adding minus one undo adding one, or add another one?
What’s true
A minus sign belongs to its number and changes what that number contributes.

Use this chapter three ways