Lesson 1 of 8 · Grade 1
Put two groups together
Adding means putting two groups together to find how many in all.
Step 1
Learn it
-
Two groups
There are 3 red dots and 2 blue dots.
-
Put them together
Count them all: 1, 2, 3, 4, 5. The plus sign + means put together.
-
Write it
3 + 2 = 5. Say it: three plus two equals five.
Step 2
Watch how
Two examples, worked out one step at a time.
-
4 + 3 = ?
Start at 4 and count on 3: 5, 6, 7. In all there are 7.
Answer: 7 -
6 + 2 = ?
Start at 6 and count on 2: 7, 8.
Answer: 8
Step 3
Play with it
Split a number into two parts. Slide to change them.
Step 4
Practice
Five questions. Think first. Then tap Show answer.
-
2 + 2 = ?
Show answer
4
-
5 + 3 = ?
Show answer
8
-
4 + 4 = ?
Show answer
8
-
7 + 2 = ?
Show answer
9
-
6 + 4 = ?
Show answer
10