How many more do we need to add to $393$393 to get to $400$400?

How many more do we need to add to $460$460 to get to $500$500?

We want to find how many more we need to add to $488$488 to get to $500$500.

We want to find $8+493$8+493.

Use simple additive strategies with whole numbers and fractions

Generalise that whole numbers can be partitioned in many ways