 St Paul's C of E Primary School

Heathside Grove

LEARNING to make a difference

# Autumn 2

Calculation

This half-term, we are learning to:

• Perform mental calculations including with mixed operations and large numbers and decimals
• Add and subtract whole numbers and decimals using formal written methods (columnar addition and subtraction)
• Use estimation to check answers to calculations and determine, in the context of a problem, an appropriate degree of accuracy
• Use knowledge of the order of operations to carry out calculations
• Solve addition and subtraction multi-step problems in contexts, deciding which operations and methods to use and why
• Solve problems involving all four operations, including those with missing numbers
• Identify common factors, common multiples and prime numbers
• Perform mental calculations, including with mixed operations and large numbers
• Multiply multi-digit numbers up to 4 digits by a two-digit whole number using the formal written method of long multiplication
• Multiply one-digit numbers with up to two decimal places by whole numbers
• Divide numbers up to 4 digits by a two-digit whole number using the formal written methods of short or long division, and interpret remainders as whole number remainders, fractions, or by rounding, as appropriate for the context
• Use written division methods in cases where the answer has up to two decimal places
• Use estimation and inverse to check answers to calculations and determine, in the context of a problem, an appropriate degree of accuracy
• Use knowledge of the order of operations to carry out calculations

We will then used our knowledge to solve reasoning and problem solving questions.

Challenge

1. Subtract nought point seven five from six.

2. What number is 199 more than 428?

3. Calculate 3.81 + 18.3.

4. 100 – (22.75 + 19.08) =

5. Use a written method to calculate 24 × 13. What do you need to change to show a similar method to work out 2.4 × 13?

6. Find the area of a swimming pool which is 25 m long and 7.5 m wide.

7. How many hours in a fortnight?

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