Addition and Subtraction

In this lesson, we will learn about the commutative law of addition using aggregation.

In this lesson, we will learn about the commutative law of addition using augmentation.

In this lesson, we will look at the commutative law of addition in measuring contexts.

In this lesson, we will embed our understanding of equivalent expressions.

In this lesson, we will learn about how ten can be partitioned into pairs of numbers that sum to ten.

In this lesson, we will reason about expressions using number bonds to 10.

In this lesson, we will use knowledge of pairs of numbers that sum to 10.

In this lesson, we will learn that adding one gives one more.

In this lesson, we will learn that subtracting one gives one less.

In this lesson, we will learn that consecutive numbers have a difference of one.

In this lesson, we will add two to odd numbers and to even numbers.

In this lesson, we will subtract two from odd numbers and from even numbers.

In this lesson, we will learn that addition and subtraction facts for the pairs 5 and 3, and 6 and 3, can be related to known facts and strategies.

In this lesson, we will learn that, when adding or subtracting zero to a number, the number remains unchanged.

In this lesson, we will learn that subtracting a number from itself gives a difference of zero.