Bonds to 10, 20 and 100, including with decimals

These PowerPoints are designed to help with the teaching of or revision of bonds. They presume an existing knowledge of bonds to 10.
One is a PowerPoint to help to introduce or revise the technique of using knowledge of bonds to speed up addition of several numbers (a number ‘string’). The slides are animated to help with seeing the process. The examples are all single digits.
Another shows how knowledge of bonds to ten facilitates bonds to 100 using multiples of ten.
Another shows how to bond any two-digit number to 100 using the idea of ‘make ninety-ten’.
Another shows how to find bonds to ten involving decimal numbers, equating the process to the ‘ninety-ten’ idea.
Finally, I’ve added a PowerPoint that simply practises bonds to 20. It has no teaching slides.

I hope you find these resources useful. If you do, please give them a review, to indicate to others that they are worth downloading.