Depth 1 · 32 s
Counting on
Three and five make eight - count them all, or start at three and count on five hops to the right. Bigger sums go through ten, and the order never matters.
About this video
Adding puts groups together to find how many there are in all. This short animation starts with three dots and five dots. You can push them together and count every one: eight. Or you can start at three and count on five more, which is the same as hopping five steps to the right along the number line. Counting on is quicker, and it is how most people add small numbers in their heads.
Bigger sums are easier if you make a ten first. In 8 + 5, two of the five fill the eight up to ten, and three are left over, so 8 + 5 = 10 + 3 = 13. Finally, the video turns the row of dots around. Three and five becomes five and three, and nothing about the dots has changed, so 3 + 5 = 5 + 3. The order you add in doesn't matter. This video goes with the Adding Is Counting On lesson of Numbers Level 1 on Knaph.
This video shows depth 1 of Addition.
Learn AdditionTranscript
- 0:00Three dots and five dots. How many in all?
- 0:04Put them together and count every one. Eight.
- 0:09Or start at three and count on five. One hop to the right for each.
- 0:15For bigger sums, make a ten. Eight and two is ten, and three more is thirteen.
- 0:21Now turn the row around. Five and three is the same eight.
- 0:27Adding is counting on.