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## PS RU P1L5 Subtraction within 10 WS

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# PS RU P1L5 Subtraction within 10 WS

### PS RU P1L5 Subtraction within 10 WS

PRIMARY 1

Rev Up! Math

Name

Tutor

Topic Subtraction Within 10 (Lesson 5)
Subtraction Within 10 (Lesson 5)

Primary 1: Rev Up! Math

There are 3 bears in this family.
Papa Bear went to the forest to hunt for food.
How many bears are there left?

Note:
When we are looking for the part, we subtract.

Total Part Went to the forest
Part Left (or Remainder)
Whole

Subtraction equation:

Whole - Part Part

=

There are bears left.

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Primary 1: Rev Up! Math

TakingAway: Whole: Part
penguins are left.
We can Part
cross out penguins walk away.
these 4
since we
are
taking
away.

Subtraction equation: -=

penguins are left.

Counting Backwards:

Whole 12 3 4 5 6

penguins - =

Part

4 penguins walk away

Part Subtraction
penguins left equation:

penguins are left.

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Primary 1: Rev Up! Math

Exercise 1: Fill in the missing numbers to complete the number bonds.

1 5

3 5

12

2 6

10 8

4 5

*3 7
8
6
2
6
*4 9
8 10
7
5

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Primary 1: Rev Up! Math
Exercise 2: Look at the pictures. Complete the subtraction equations.

Eg.

5-2= 3

1 8-5=
2 10 - 7 =

3 6- =
* 4 7- =

5 -=

6 -=

*7 - =

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Primary 1: Rev Up! Math
Exercise 3: Look at the pictures. Then fill in the blanks with the

1

is 1 less than 5.

2

is 2 less than 10.

*3

is 4 less than 9.

123456789

1. 2 less than 4 is .
2. 4 less than 4 is .
.
*3. 3 less than 8 is

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Primary 1: Rev Up! Math

Exercise 5: Complete the number bonds to show the parts and
wholes. Then complete the subtraction equations. Part

Whole

1.
5

5- 3= Part

2.

8- 4=

3.

6- 6=
*4.

10 - 6 =

* 5.

9- 7=

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Primary 1: Rev Up! Math

Exercise 6: Complete the number bonds. Then, write two subtraction
equationsfor each picture.

Example:

2 6- 4= 2

6

4 6- 2= 4

1)

-= 6
-= 10

2) 3
9
-=
-=

* 3)

-= 1
-= 6

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Primary 1: Rev Up! Math

Exercise 7: Fill in the boxes with the correct answer.

E.g. 10 butterflies
There are 3 mosquitoes
7 fewer mosquitoes than butterflies.

1.
cars

boys

There are more cars than boys.
2.
prawns
There are
3. crabs

fewer crabs than prawns.

teddy bears

There are honey jars
more teddy bears than honey jars.

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Primary 1: Rev Up! Math

Extension

Exercise 8: Find the patterning in the number sequence and work
out the followingsums.

1. 1 , 3 , 6 , 10 , 15 , ,

1 , 3 , 6 , 10 , 15 , 21 , 28

+2 +3 +4 +5 +6 +7

2. 1 , 5 , 9 , 13 , 17 , ,

1, 5, 9 , 13 , 17 , ,

+ + + ++ +

3. 1 , 4 , 7 , 10 , 13 , ,

1, 4, 7 , 10 , 13 , ,

+ + + ++ + 9

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Primary 1: Rev Up! Math

4. 2, 3, 5, 8, 12, ,

5. 1, 4, 9, 16, 25, ,

6. 2, 7, 12, 17, 22, ,

7. 3, 6, 10, 15, 21, ,

8. 5, 7, 10, 14, 19, ,

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PS RU P1L10 Numbers to 20 WS
PS RU P1L6 Semester 1 Review 1 WS