The numbers that are said when we count on in tens from zero. Multiples of ten always have a ones digit of zero.

To add the parts of a number gained through partitioning the whole to reach the whole amount again.

Add multiples of 10 to 2-digit numbers.

Maths

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.

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

Look at the number line. What equation is it showing?

16 + 50 = ?     How many tens are being added to 16 in this equation? {{ }} tens

Which of the images represent this equation? 36 + 40 =

Match the known facts that will help to add multiples of 10

What could we do to help solve this equation? 32 + 40 =

Match two numbers that have a difference of 10

This lesson will soon be taken down.

Add multiples of 10 to 2-digit numbers.

Lesson outcome