A short and simple book. Bonds to 100 are pairs of numbers that add together to make 100. This simple book may help to reinforce adding numbers to 100. There are lots of opportunities to challenge your child. You have blank square questions so you can determine if your child knows the missing number to add to make 100. You can consolidate and reinforce your child's knowledge with various simple questions. Do you know your bonds to 100? Do you know your number pairs to 100? Do you know how to count to 100?