Extending calculation strategies and additive reasoning

In this lesson, we will be adjusting addends to make a calculation easier, keeping the sum the same.

In this lesson, we will be extending the 'same sum' strategy to the addition of larger numbers.

In this lesson, we will be extending the 'same sum' strategy to calculations with decimal fractions.

In this lesson, we will be extending the 'same sum' rule to balance equations.

In this lesson, we will be balancing equations using the compensation property of addition and subtraction.

In this lesson, we will be balancing equations and noticing that the order of the addends is not important.

In this lesson, we will notice that, if an addend is increased and the other is kept the same, the sum increases by the same amount.

In this lesson, we will notice that, if one addend is decreased and the other is kept the same, the sum decreases by the same amount

In this lesson will be solving calculations mentally by relating them to known facts.

In this lesson, we will be finding an unknown addend when the sum is changed.

In this lesson, we will learn about the 'same difference' strategy.

In this lesson, we will learn about contexts which focus on where the difference is kept the same.

In this lesson, we will use the some of the language of subtraction used in previous lessons- minuend, subtrahend and difference.

In this lesson, we will transform subtraction calculations by using the "same difference" method. This method involves shifting numbers whilst preserving the answer, but making the calculation easier.

In this lesson, we will practise transforming calculations to make them easier to solve mentally

In this lesson, we will transform a subtraction calculation between two five digit numbers to make the written algorithm easier to apply.

In tthis lesson, we will practise the 'same difference' in different contexts. We will learn that transforming written calculations makes it easier to solve them using a written method.

In this lesson, we will learn to balance equations to find unknown values. We will learn how the image of a see-saw helps us think about equivalent calculations, if they are level, they are equal (equivalent) to each other.

In this lesson, we will explore how the difference changes when only the minuend is changed.

In this lesson, we will apply the generalisation about how the minuend and difference change to solve problems.