52 plus seven equals what?
We need to find out what’s seven more than 52 is. We can think of 52 as 50 plus two. Let’s see what this looks like on a set of ten frames. Here are five full ten frames. Each frame represents 10. Five tens are 50. This ten frame has two counters on it. There are 52 counters altogether. 50 plus two equals 52.
So we start off with 52, and we need to add seven more counters. We’re going to add our seven counters to this ten frame here. What happens if we add seven counters to two counters? Well, we know seven add two equals nine. Let’s see how the total changes as we add seven counters: one, two, three, four, five, six, seven. Two plus seven equals nine. And so 52 plus seven equals 59. Because we know two and seven are a pair that makes nine, we could use this to help us. 52 plus seven equals 59.