10 more than is when there is a greater amount by 10 than another item in the set.

10 less than is when there is a smaller value by 10

Make something bigger (in size or quantity).

Make something smaller (in size or quantity).

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

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

Match the number of tens to the correct multiple of 10

the tens digit increases by one, but the ones digit remains the same.

the tens digit decreases by one, but the ones digit remains the same.

Match so that the second number is 10 more than the first.

Look at the number in the place value chart. 10 less than this number is {{ }}

Which equation would be used to solve this problem? Sam collected 56 pebbles and Alex collected 8 
    How many pebbles did they collect altogether? 

Sam and Alex collected 45 shells but Alex dropped some. Now, they have 37 shells. How many did Alex drop? {{ }} shells.

Alex and Sam collected 34 pencils in class. Sam collected 7 pencils. How many did Alex collect? {{ }} pencils.

Which of these equations can be solved by bridging a multiple of 10? 

Which of these known facts could help you to solve this equation? 66 + 7 = ___

This lesson will soon be taken down.

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

Lesson outcome