Subtracting multiple jumps of ten on an empty number line

Now your child can subtract one jump of ten, we can move on to multiple jumps of ten.

This is a tricky step as it needs the child to be able to subtract multiples of ten mentally. Again it is important to set out the jumps clearly and remember that the next number needs to be written where the jump touches down on the line.

Watch the clip below to practice this method with your child.

Subtracting a jump of ten on an empty number line

The next stage in subtraction is to take away a jump of ten. Your child needs to have a secure understanding of place value to subtract one ten mentally.

They need to understand that only the tens digit is changed.

e.g. 37 – 10 = 27

The tens column has become less by one ten while the units have stayed the same. This mental strategy is vital and any opportunity you have to practice adding and subtracting tens would be very beneficial.

To help them understand this concept we begin our sum on the right hand side on the number line and jump backwards to reinforce the concept of numbers getting smaller.

To practice this written strategy please watch the clip below.

Subtracting units on an empty numberline

When we introduce subtraction on an empty number line it is important that your child understands that subtraction means the numbers will be getting smaller.

To help them understand this concept we begin our sum on the right hand side on the number line and jump backwards to reinforce the concept of numbers getting smaller.

To practice this written strategy please watch the clip below.

A3: Forward Jump -Adding multiple jumps of ten on an empty number line

Once your child can master adding on one jump of ten, they can apply their understanding to adding on more than one jump of ten.

It is important that they realise that the tens column is the one increases when 10 is added.

e.g.  12 + 10 = 22

The tens column increases by 1 ten.

Watch the clip below to practice this written method at home.

A3: Forward Jump -Adding a jump of ten on an empty number line

This is the next step after adding units. It is very important that the child understands how the place value of a digit changes when we add on a jump of 10.

The jump of ten needs to be larger than the unit jumps as this helps the child to distinguish between the value. Again it is very important that the jumps are big enough to be written it. This step is vital in the understanding of the method.

Watch the clip below to practice adding on a jump of ten with your child.