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2.78 + 0.22 = 3

Addition and Subtraction (Year 6)

In Year 6, which is the fourth year in KS2 Maths and just before secondary school, you'll tackle tricky addition and subtraction problems. You'll learn words like altogether, difference, increase, and decrease.

Knowing how to add and subtract is super useful in everyday life, like when counting things in a shop. Imagine a bakery with 100 iced buns, selling 60 by lunch. If someone wants 38 buns in the afternoon, the baker must figure out if there are enough left. It's like solving puzzles!

You might use these skills to find out when your grandma was born. If she's 60, subtract that from the current year for the answer. Try a fun Year 6 quiz to test your addition and subtraction knowledge!

Make Learning Exciting - Explore how quizzes help

Which strategy would be best to add 69 + 61 + 65 + 67?

(60 x 4) + (1 + 5 + 7 + 9)

(70 x 4) - (1 + 5 + 7 + 9)

(61 + 65) + (67 + 69)

(60 x 4) - (1 + 5 + 7 + 9)

60 x 4 = 240 and 1 + 5 + 7 + 9 = 22
240 + 22 = 262

Which strategy would be best to subtract 2.9?

Add 3 subtract 1

Subtract 3 add 0.1

Subtract 3 subtract 0.1

Subtract 3 add 1

e.g. 3.4 - 2.9:
3.4 - 3 = 0.4
0.4 + 0.1 = 0.5
so 3.4 - 2.9 = 0.5

What is the best method of adding 34 + 48 + 56?

Find the pair that total a multiple of 100 - add these first

Find the pair that total a multiple of 10 - add these first

Add 10s first then the ones

Double 34 then adjust

34 + 56 = 90 which is a multiple of 10 now add 48 so 90 + 48 = 138

Increase 450 by 230.

220

280

580

680

Increase means get larger so we add the numbers

Which of these number sentences is incorrect?

2.56 + 3.41 = 5.97

5.97 - 3.41 = 2.56

5.97 - 2.56 = 3.41

3.41 - 2.56 = 5.97

3.41 - 2.56 = 0.85

How many altogether are 258 and 162?

320

400

420

450

One way to work this out is to add the ones: 2 + 8 = 10
then the tens: 50 + 60 = 110
then the hundreds: 200 + 100 = 300
then add them all together: 300 + 110 + 10 = 420

What is the best method of adding 0.9?

Add 1 subtract 1

Add 1 add 0.1

Subtract 1 subtract 0.1

Add 1 subtract 0.1

e.g. 1.3 + 0.9:
1.3 + 1 = 2.3
2.3 - 0.1 = 2.2
so 1.3 + 0.9 = 2.2

Decrease 2.5 by 1.8.

0.6

0.7

1.7

4.3

Decrease means get smaller so we subtract the numbers

What is the difference between 6.3 and 2.4?

2.9

3.9

4.1

Difference means take the smaller number away from the larger

10.

Which of these pairs would not make a whole number?

2.78 + 0.22

3.54 + 2.46

5.01 + 1.9

4.97 + 2.03

5.1 + 1.9 = 7 but 5.01 + 1.9 = 6.91 which is not a whole number

You can find more about this topic by visiting BBC Bitesize - Adding and subtracting

Author: Amanda Swift

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Addition and Subtraction (Year 6)

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