This is the first set of worksheets we have published which uses multiples of 100.  The questions on the first two pages are straightforward addition of a single digit to a multiple of 100. Just watch for a typical mistake that many children make when first trying this kind of sum when they just tag the units digit on the end (eg 200 + 5 = 2005). The third and fourth pages  are slightly more tricky as different parts of the number sentence need to be entered. It's a good idea to sit down with your child as they are doing these and ask them to read out the numbers as they go along, to make sure that they do, in fact, read them correctly. These pages can be found in our Year 2 section, under Addition. Go to our Adding to a multiple of 100 worksheets