Text Book Back Exercises Questions with Answers, Solution : 4th Maths : Term 1 Unit 3 : Patterns : 4th Maths : Term 1 Unit 3 : Patterns : Cast out nines from a given number to check if it is a multiple of nine.

__Exercise 3.2__

**1. ****Circle/underline the multiples of 9 (by
using casting out nine).**

a) 9443

b) __1008__

c) 24689

d) __23769__

e) 13476

**a) 9443 **

~~9~~443

4+4+3 = 11

= 1 + 1 = 2

2 ≠ 9

Not multiple of 9

**b) 1008**

1+8=9

Multiple of 9

**c) 24689 **

2468~~9~~

2+4+6+8 = 20

= 2 + 0

2≠9

Not multiple of 9

**d) 23769**

2376~~9~~

It is multiple of 9

**e) 13476**

1~~3~~47~~6~~

1+4+7 = 12

1+2 = 3 ≠ 9

It is not multiple
of 9

**2. ****Circle the correct addition fact
(by using casting out nine method).**

a) __4355 + 5369 = 9724__

b) __7632 + 2213 = 9845__

c) 6023 + 3203 = 9220

d) 2436 + 5315 = 7701

a) **4355 + 5369 = 9724**

3__4__5 + 5__5__ = __369__4__972__

3+5+5 = 4

13 = 4

1 + 3 = 4

4 = 4

It is correct
addition fact.

b) **7632 + 2213 =
9845**

+ 2213 = __7632__8__9____45__

2+2+1+3 = 8

8 = 8

It is correct
addition fact.

c) **6023 + 3203 =
9220**

02__6__ + 3203 = __3__220__9__

2+3+2+3 = 2+2

2 + 8 = 4

10 = 4

1 ≠ 4

It is not correct
addition fact.

d) **2436 + 5315 =
7701**

24 + 5315 = 7701__36__

2+4 + 5+3+1+5 = 7 +
7 + 1

6+14 = 15

20 = 15

2 ≠ 6

It is not correct
addition fact.

**3. ****Circle the correct subtraction
fact (by using casting out nine methods).**

a) __7420
− 3625 = 3795__

b) 2362 − 632 = 1720

c) __6732
− 4361 = 2371__

d) 3264 − 1063 = 2200

**a) 7420 − 3625 = 3795**

7420 − 25 = 37__36__5__9__

7 + 4 + 2 − 7 =
3+7+5

13 – 7 = 15

6 = 6

It is correct
subtraction fact.

**b) 2362 − 632 = 1720**

22 − __36__2 = 1__63__0__72__

4 − 2 = 1

2 = 1

2 ≠ 1

It is not correct
subtraction fact.

**c) 6732 – 4361 = 2371**

63__7__ – 4__2__1
= __36__3__2__1__7__

6+3 – 4+1 = 3+1

9 − 5 = 4

4 = 4

It is correct
subtraction fact.

**d) 3264 − 1063 =
2200**

2__3__4 − 10__6__ = 2200__63__

2 + 4 − 1 = 2 + 2

6 – 1 = 4

5 ≠ 4

It is not correct
subtraction fact.

Tags : Patterns | Term 1 Chapter 3 | 4th Maths , 4th Maths : Term 1 Unit 3 : Patterns

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4th Maths : Term 1 Unit 3 : Patterns : Exercise 3.2 (Patterns in numbers) | Patterns | Term 1 Chapter 3 | 4th Maths

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