NCERT Revision Notes for Class 1 Maths Chapter 3: Mango Treat – Free PDF Download

Chapter 3 of Class 1 Joyful Mathematics, Mango Treat, uses a story about sharing mangoes to introduce the idea of addition — joining two groups of objects together to find out how many there are in all. This is one of the first formal addition chapters in the book, and it builds directly on the counting skills children already have.

Key Concepts

Addition (joining): putting two or more groups of things together and counting the total number of objects.

The plus sign (+): the symbol used to show that two numbers are being joined together, read as “plus”.

The equal sign (=): the symbol that shows the total or answer after joining the groups, read as “equals” or “is equal to”.

Counting on: a quick way to add by starting from the bigger number and counting forward by the smaller number, instead of counting every object from one.

Number stories: short real-life stories, like mangoes being picked or shared, that can be written as an addition sum, for example “3 mangoes and 2 more mangoes make 5 mangoes”.

Order does not matter: adding 3 + 2 gives the same answer as adding 2 + 3; this is an early, informal introduction to the idea that addition can be done in any order.

Worked Examples

Example 1

Ravi has 4 mangoes in a basket. His friend gives him 3 more mangoes. How many mangoes does Ravi have now? We join the two groups: 4 + 3 = 7. Ravi has 7 mangoes.

Example 2

There are 2 mangoes on a plate and 6 mangoes in a bag. Using counting on, we start at 6 and count forward 2 more: 7, 8. So 6 + 2 = 8 mangoes in all.

Example 3

Fill in the blank: 5 + __ = 9. Since 5 and 4 more make 9, the missing number is 4.

Quick Recap

• Addition means joining groups together to find the total.
• The plus (+) sign joins numbers, and the equal (=) sign shows the answer.
• Counting on from the bigger number is faster than counting every object.
• Turning real situations into number sentences is called writing a number story.
• 3 + 2 and 2 + 3 both equal 5 — the order of the numbers being added does not change the total.

Common Mistakes to Avoid

• Recounting all the objects from one instead of counting on from the bigger number, which is slower and more likely to cause errors.
• Mixing up the plus and equal signs when writing a number sentence.
• Forgetting to include both groups when solving a number story, especially when the story has more than one sentence of information.
• Losing track while counting on and skipping or repeating a number.
• Not checking whether the answer makes sense, for example ending up with a smaller total than either starting group.

Home Practice Tips

• Use real fruits, buttons, or small toys at home to physically join two groups before writing the addition sum.
• Make up simple number stories together, such as “2 birds were sitting on a branch, 3 more birds came, how many now?”
• Practise counting on using fingers, starting from the bigger number.
• Ask the child to find two numbers that add up to a target number, like 7, using small objects.
• Play a quick oral quiz with sums up to 10 while doing daily chores.

Frequently Asked Questions

Q1. Why does the book use a story about mangoes to teach addition?
A familiar, real-life story helps children connect the abstract idea of joining numbers with something they can picture and relate to, making the concept easier to understand.

Q2. What is the difference between counting all and counting on?
Counting all means counting every object in both groups from the beginning, while counting on means starting from the bigger number and counting forward only by the smaller number — counting on is quicker.

Q3. Does the order of numbers matter in addition?
No, adding 4 + 3 gives the same total as adding 3 + 4; this chapter introduces this idea informally through examples rather than as a rule to memorise.

Q4. How can I help my child with addition word problems at home?
Read the story together, act it out with real objects if possible, identify the two groups being joined, and then write it as a number sentence before solving.

Q5. What comes after this chapter in the addition skills sequence?
Later chapters build on this by introducing making 10, larger sums, and eventually subtraction as the opposite of addition.

Full walkthrough: Chapter 3 Solutions · Extra Questions.

Written by Satish

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