Introduction:
Add in any order:
We can change the order of the addends. The sum is the same.
4 and 5 is 9.
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5 and 4 is 9.
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We can write two addition equations.
4 plus 5 is 9.
5 plus 4 is 9.
Example1:
Colour to change the order of the addends. Then write the addition equation.
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Sol:
1 and 5 is 6.
1 + 5 = 6
5 and 1 is 6.
5 + 1 = 6
Two addition equations
1 + 5 = 6
5 + 1 = 6
Example2:
You have 3 boxes. Tom brings 4 more. How many total boxes do you have? Write two addition equations.
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Sol:
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You have boxes = 3
Tom brings more = 4
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Total boxes you have
3 + 4 = 7
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You can change the order of addends. The sum is the same.
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4 + 3 = 7
You have 7 boxes.
Example3:
Use the numbers on the cards to write two addition equations.
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Sol:
We have cards
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We can write two addition equations.
6 = 4 + 2
6 = 2 + 4
You can change the order of addends. The sum is the same.
Example 4:
Sanely and Anna collected 6 flowers. Then they collect 3 more. How many flowers do they collect in all? Write two different addition equations.
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Sol:
Sanely and Anna collect flowers = 6
They collect more = 3
They collect total flowers = 6 + 3 = 9
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(or)
= 3 + 6
= 9
They collect 9 flowers.
Exercise
1.Write the sum. Write the new addition equation.
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2. Write the sum for given addition equations.
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3. Write the sum. Then change the order of the addends. Write the new addition equation.
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4. Write two addition equations for the given image.
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5. Use the number on the cards to write two addition equations.
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6. Write the sum. Then change the order of the addends. Write the new addition equation.
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7. How can you use cubes to show that 5 + 4 is the same as 4 + 5?
8. There are 4 roses and 5 sunflowers in my garden. How many flowers are there in all? Write two addition equations.
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9. 5 boys are playing in the garden. 3 girls also join in. how many kids are there? Write two different equations.
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10. There are 6 birds sitting on a tree. 3 more come there. How many birds are there in alll?
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Concept Map:
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What We Have Learned
- Add in any order
- Write the sum for given addends
- Change the order of the addends
- Write the new addition equations
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