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# Year 4

### Using Our Maths B

#### Following Units 8-11

These activities bring together the different mathematical skills that your child should now know. By combining these skills in puzzles and activities your child will need to reason and think of solutions, as well as complete calculations. This will help your child to really understand the skills they are learning.

Talk through each group of questions and ask your child how they are going to solve the challenges.

It’s good to get stuck sometimes! When this happens discuss the challenge in the following order:

• What do we need to find out to solve the challenge?
• What do we know by looking at the question?
• Want could we do first?
• How would that help us?

Is there anything else we could do?

#### Activity:

Round these numbers to the nearest 10 and work out the answers in your head. Then use a calculator to find the exact answer and see how close you were.
38 + 94 = ?
27 + 12 + 39 = ?
48 – 19 = ?
88 – 36 – 11 = ?
27 + 32 – 18 = ?
56 – 27 + 12 = ?

Round these numbers to the nearest 10 to find the approximate missing number. Then find the exact missing number with a calculator.
28 – ? = 17
55 + ? = 81
? – 43 = 19
? + 68 = 92
Find the missing numbers in these additions and explain how you found each one.

Find the missing numbers in these subtractions and explain how you found each one.

Set these out in stages and work out the answers
38 + 16 – 29 = ?
26 + 15 + 19 – 32 = ?
83 – 27 + 17 = ?
47 – 18 + 98 + 21 = ?