# Video: KS1-M16 • Paper 2 • Question 20

KS1-M16-P2-Q20-847108083039

02:02

### Video Transcript

Amy has 21 counters altogether. She has 14 counters in one hand. How many counters does she have in the other hand?

We know that Amy has 21 counters altogether. And she has 14 counters in one hand. We need to work out how many counters she has in her other hand. We have some of the information we need to write our number sentence. We know that Amy has 21 counters altogether. And she has 14 counters in one hand. We need to find out how many she has in the other hand. In other words, what do we add to 14 to make 21?

To find the difference between 14 and 21 or how many we need to add to 14 to get to 21, we can start at 14 on our number line and count forward until we reach 21. One, two, three, four, five, six, seven; 14, 15, 16, 17, 18, 19, 20, 21. We counted forward seven spaces on the number line. So the missing number is seven. 14 plus seven equals 21.

Amy had 21 counters altogether. She has 14 counters in one hand. And she has seven in the other hand. 14 plus seven is 21.