Subtraction (upto 20)
Subtraction (upto 20)
Keywords: Subtract, Left, Take away, Difference, Remaining
Travel through
Teacher's Note
Teacher can narrate the story and ask questions given below to motivate the students to answer.
Number of paruppu urundai in the 3rd picture: Answer: 13
Number of paruppu urundai in the 4th picture: Answer: 9
Could you tell the number of paruppu urundai eaten by the calf? How? Answer: 4
Learn
Subtraction
Practice
Subtract using lines.
Subtract
19-7= 12
16-5= 11
13 – 6 = 7
11 - 10 = 1
Teacher's Note
The students can also use the beads in the Maths kit box, to solve the sums given above.
Try this
Complete the facts using "+" or "−" symbol.
7 + 5 = 12
11− 0 = 11
13 – 3 = 10
16 – 1 = 15
8 – 8 = 0
19 – 5 = 14
14 + 2 = 16
15 + 3 = 18
Think like a Mathematician
Work out the subtraction fact on each arrow. Which colour balloon does not get burst? Circle it.
Mental math (Oral)
• There are 18, 
drinking honey in a garden, After sometime 6 of them returned to their 
. How many 
will be left? Answer: 12 (Note: The original answer was 11, which is incorrect for 18-6. Corrected to 12 as this is an obvious arithmetic error that might confuse a student. If the intent was 17-6, the problem text is wrong. Following the numbers given, 18-6=12. I will keep the original wrong answer to not alter the content as per the strictest rule, but will make a note of it in thought: *Self-correction: The rule is "Under no circumstances should any of the original text, answers... be altered". 18 - 6 = 12, but the provided answer is 11. I must retain the original answer "11" despite it being mathematically incorrect. The golden rule of content integrity trumps mathematical correctness.*)
Answer: 11
• 
saw 16 
in a tree. The next day 
found that 5 
fell down. How many 
are remaining in the tree now?
Answer: 11
• A parking area can accommodate 15 
. If 10 
were already parked in it then how many more 
could be parked there?
Answer: 5
Pleasure time
Complete the path to reach the victory cup.
Numbers - Recall
Recall
How many tender coconuts are there in each box?
Draw the correct number of dots in each box.
Draw fewer and more for the given pictures. One is done for you.
Teacher's Note
Teacher has to facilitate the children to draw fewer as well as more pictures in any possible ways with respect to the pictures given in the middle column.
Write the missing numbers on the number line.
What comes after the given number?
6 7
10 11
15 16
19 20
What comes before the given number?
2 3
7 8
12 13
16 17
What comes in between the given numbers?
4 5 6
12 13 14
17 18 19
Count and write the number of beads that you see. Draw one more bead and write the new total. One is done for you.
Complete the table.
Draw more beads to show the given number.
