Printable Textbook: Counting in Tens - Level 2 | Mental Maths - Class 1 PDF Download

 Page 1


ME NT AL
MA T   HS
23
 
Counting in Tens
Summary
1. Ten single objects/items altogether make one bundle of 10.
 
 10 single sticks 1 bundle of 10 sticks
 (For teachers  – 10 ones = 1 tens
 At this level ones; tens terms need not be introduced. Only concept 
needs to be strengthened through activities)
2. Steps of estimating numbers
(a) Count packets/bundles of 10
(b) Count items other than in pockets/bundles
Page 2


ME NT AL
MA T   HS
23
 
Counting in Tens
Summary
1. Ten single objects/items altogether make one bundle of 10.
 
 10 single sticks 1 bundle of 10 sticks
 (For teachers  – 10 ones = 1 tens
 At this level ones; tens terms need not be introduced. Only concept 
needs to be strengthened through activities)
2. Steps of estimating numbers
(a) Count packets/bundles of 10
(b) Count items other than in pockets/bundles
ME NT AL
MA T   HS
24
(c) Count altogether all the items
3. Ten bindis can be arranged in different ways which are visually easy to 
count for example—
1. Vijay has 10 copies. Nitin has 20 copies. How many copies are there  
in all?
2. How many garlands of 10 flowers can you make using 38 flowers? How 
many flowers will be left?
10 10 10
111
Total  =   33
Page 3


ME NT AL
MA T   HS
23
 
Counting in Tens
Summary
1. Ten single objects/items altogether make one bundle of 10.
 
 10 single sticks 1 bundle of 10 sticks
 (For teachers  – 10 ones = 1 tens
 At this level ones; tens terms need not be introduced. Only concept 
needs to be strengthened through activities)
2. Steps of estimating numbers
(a) Count packets/bundles of 10
(b) Count items other than in pockets/bundles
ME NT AL
MA T   HS
24
(c) Count altogether all the items
3. Ten bindis can be arranged in different ways which are visually easy to 
count for example—
1. Vijay has 10 copies. Nitin has 20 copies. How many copies are there  
in all?
2. How many garlands of 10 flowers can you make using 38 flowers? How 
many flowers will be left?
10 10 10
111
Total  =   33
ME NT AL
MA T   HS
25
Answer Questions from 3 to 7
 One day Jeetu went to a park, with his grand father. There were many 
big trees many leaves were falling from these trees. He decided to collect 
leaves of different plants. He put leaves of different plants in transparent 
bags. His grand father helped him in this process.
  Ashoka Neem
  Peepal Guava
His grandfather asked him some questions. (3 to 7)
3. Which bag has maximum number of leaves?
4. How many leaves are there in bag having Ashoka’s leaves?
5. How many leaves he collected in total?
6. How many bundles of 10 leaves can you make using Neem leaves?
7. How many bundles of 10 leaves can you make using Guava leaves?
8. Ramu halwai has to pack laddoos in boxes. He wants to keep 10 laddoos 
per box. He decides to make 90 laddos. How many boxes does he require?
9. A mali wants to make a garland with 10 flowers. He is asked to make 4 
such garlands. How many flowers in all will be required?
Page 4


ME NT AL
MA T   HS
23
 
Counting in Tens
Summary
1. Ten single objects/items altogether make one bundle of 10.
 
 10 single sticks 1 bundle of 10 sticks
 (For teachers  – 10 ones = 1 tens
 At this level ones; tens terms need not be introduced. Only concept 
needs to be strengthened through activities)
2. Steps of estimating numbers
(a) Count packets/bundles of 10
(b) Count items other than in pockets/bundles
ME NT AL
MA T   HS
24
(c) Count altogether all the items
3. Ten bindis can be arranged in different ways which are visually easy to 
count for example—
1. Vijay has 10 copies. Nitin has 20 copies. How many copies are there  
in all?
2. How many garlands of 10 flowers can you make using 38 flowers? How 
many flowers will be left?
10 10 10
111
Total  =   33
ME NT AL
MA T   HS
25
Answer Questions from 3 to 7
 One day Jeetu went to a park, with his grand father. There were many 
big trees many leaves were falling from these trees. He decided to collect 
leaves of different plants. He put leaves of different plants in transparent 
bags. His grand father helped him in this process.
  Ashoka Neem
  Peepal Guava
His grandfather asked him some questions. (3 to 7)
3. Which bag has maximum number of leaves?
4. How many leaves are there in bag having Ashoka’s leaves?
5. How many leaves he collected in total?
6. How many bundles of 10 leaves can you make using Neem leaves?
7. How many bundles of 10 leaves can you make using Guava leaves?
8. Ramu halwai has to pack laddoos in boxes. He wants to keep 10 laddoos 
per box. He decides to make 90 laddos. How many boxes does he require?
9. A mali wants to make a garland with 10 flowers. He is asked to make 4 
such garlands. How many flowers in all will be required?
ME NT AL
MA T   HS
26
10. Maya’s mother has told her to keep her books in shelf in such a way that 
each line in the shelf has 10 books. Maya has 30 books. How many lines 
will be formed?
11. 10 books can be arranged on a shelf in a 4-shelved Almirah. How 
many students can put their books in the almirah if each students has  
10 books?
12. Mrs. Surjeet has 60 chickens. He thought of counting them. So she put 10 
chickens in one basket then how many baskets she needs?
13. 60 + 8 = 
14. 68 – 8 = 
1
2
3
4
Page 5


ME NT AL
MA T   HS
23
 
Counting in Tens
Summary
1. Ten single objects/items altogether make one bundle of 10.
 
 10 single sticks 1 bundle of 10 sticks
 (For teachers  – 10 ones = 1 tens
 At this level ones; tens terms need not be introduced. Only concept 
needs to be strengthened through activities)
2. Steps of estimating numbers
(a) Count packets/bundles of 10
(b) Count items other than in pockets/bundles
ME NT AL
MA T   HS
24
(c) Count altogether all the items
3. Ten bindis can be arranged in different ways which are visually easy to 
count for example—
1. Vijay has 10 copies. Nitin has 20 copies. How many copies are there  
in all?
2. How many garlands of 10 flowers can you make using 38 flowers? How 
many flowers will be left?
10 10 10
111
Total  =   33
ME NT AL
MA T   HS
25
Answer Questions from 3 to 7
 One day Jeetu went to a park, with his grand father. There were many 
big trees many leaves were falling from these trees. He decided to collect 
leaves of different plants. He put leaves of different plants in transparent 
bags. His grand father helped him in this process.
  Ashoka Neem
  Peepal Guava
His grandfather asked him some questions. (3 to 7)
3. Which bag has maximum number of leaves?
4. How many leaves are there in bag having Ashoka’s leaves?
5. How many leaves he collected in total?
6. How many bundles of 10 leaves can you make using Neem leaves?
7. How many bundles of 10 leaves can you make using Guava leaves?
8. Ramu halwai has to pack laddoos in boxes. He wants to keep 10 laddoos 
per box. He decides to make 90 laddos. How many boxes does he require?
9. A mali wants to make a garland with 10 flowers. He is asked to make 4 
such garlands. How many flowers in all will be required?
ME NT AL
MA T   HS
26
10. Maya’s mother has told her to keep her books in shelf in such a way that 
each line in the shelf has 10 books. Maya has 30 books. How many lines 
will be formed?
11. 10 books can be arranged on a shelf in a 4-shelved Almirah. How 
many students can put their books in the almirah if each students has  
10 books?
12. Mrs. Surjeet has 60 chickens. He thought of counting them. So she put 10 
chickens in one basket then how many baskets she needs?
13. 60 + 8 = 
14. 68 – 8 = 
1
2
3
4
ME NT AL
MA T   HS
27
15. Ms. Lalita has 3 pockets of pencils. Each packets has 10 pencils. How many 
pencils she has in total?
Answer Key
1. 30 copies 9. 40 flowers  
2. 3, 8 10. 3 lines
3. Neem bag 11. 4 students 
4. 30 leaves 12. 6 baskets
5. 96 leaves 13. 68 
6. 3 bundles 14. 60
7. 2 bundles 15. 30 pencils 
8. 9 boxes