An equation has an equal sign. It shows that what is on the left of the equation is equal to what is on the right.

Use number facts to add or subtract a one-digit number and a two-digit number.

Maths

Add and subtract one to or from a two-digit number within a decade

Add and subtract 1 to and from a 2-digit number crossing the tens boundary

Use number facts to solve addition and subtraction problems.

Use number facts to solve problems in measures and data contexts

Use number bonds to 10 to add/subtract one-digit and two-digit numbers

Add by bridging a multiple of ten

Subtract by bridging a multiple of ten

Use bridging to solve addition and subtraction problems

Find 10 more or less than a 2-digit number.

Add and subtract 10 to and from a 2-digit number.

Add multiples of 10 to 2-digit numbers.

Subtract multiples of ten from 2-digit numbers

Partition 2-digit numbers in different ways

Use efficient strategies to solve problems

In this unit pupils will add and subtract 1s and 10s from 2 digit numbers. They will use number facts to add/subtract a single-digit number to/from a 2-digit number. They will use a part-part-whole model to represent addition and subtraction. In the future unit pupils will learn to find 10 more or less than a 2-digit number They will  add and subtract 10 to/from a 2-digit number using number facts

In the prior unit pupils added 3 addends. They used strategies such as finding 2 addends to total 10 or 2 numbers to bridge though 10. In this unit pupils will add and subtract 1s and 10s from 2 digit numbers. They will use number facts to add/subtract a single-digit number to/from a 2-digit number. They will use a part-part-whole model to represent addition and subtraction.

In this unit pupils will add and subtract 1s and 10s from 2 digit numbers. They will use number facts to add/subtract a single-digit number to/from a 2-digit number. They will use a part-part-whole model to represent addition and subtraction.

Adding and subtracting ones and tens to and from 2-digit numbers

Which equation would come next in the pattern?

Which known fact could be used to solve the equation shown on the number line?

Which of the following equations can be solved using the known fact 3 + 5 = 8?

Which number will make both of the following equations correct?

Match the missing number equations to the correct answer.

Which decade is missing on the number line?

Alex subtracts 1 from these Base 10 blocks. Which image shows the number he now has?

Alex taps one more than the number shown. What number does he tap?

Which of the following could be Sam’s number?

Alex thinks of a two-digit number. It is 1 less than a multiple of ten. It is greater than 80 but less than 90      What is his number?

This lesson was made for home learning during the pandemic.

Use number facts to add or subtract a one-digit number and a two-digit number.

Lesson outcome

This lesson was made for home learning during the pandemic.