Review column addition and identify the addends and sum

Maths

Review and use knowledge of place value to correctly lay out column addition

Review adding 2-digit numbers using column addition without regrouping

Review adding 3-digit numbers using column addition without regrouping

Use column addition to solve problems in different contexts

Review using column addition to add 2- and 3-digit numbers by regrouping ones

Review using column addition to add 2- and 3-digit numbers by regrouping tens

Review using column addition with regrouping in the ones and tens columns

Review using known facts and strategies to accurately and efficiently use and check column addition

Use knowledge of column addition to solve problems in a range of contexts

Review identifying the minuend and subtrahend in column subtraction

Review using column subtraction to subtract without regrouping

Review using column subtraction with regrouping from tens to ones

Review using column subtraction with regrouping from hundreds to tens

Decide on the most efficient subtraction strategy, including column subtraction

In this unit pupils will revisit column addition with regrouping and column subtraction with exchanging to solve problems. In the future unit pupils will consolidate column addition with regrouping and column subtraction with exchanging to solve problems. They will use known facts and strategies to accurately and efficiently calculate and check.

In the prior unit pupils identified the minuend and the subtrahend in column subtraction and explained the column subtraction algorithm. They subtracted from a 2-digit number using column subtraction with exchanging. In this unit pupils will revisit column addition with regrouping and column subtraction with exchanging to solve problems.

In this unit pupils will revisit column addition with regrouping and column subtraction with exchanging to solve problems.

Review of column addition and subtraction

What are the addends in this column addition?

Alex represents the column addition as a bar model to describe the parts and whole. Which bar model shows the correct position of 83?

Look at the column addition. Which statements are correct?

Which equations match the column addition?

What calculation is represented by the Base 10 blocks?

Which numbers in the bar model are the addends?

Which number in the bar model is the sum?

Which numbers are the addends in this equation? 76 = 22 + 54

What is the sum is this equation? 99 = 55 + 44 

Review column addition and identify the addends and sum

Lesson outcome