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.