The same idea works from 8. It just needs 2 instead of 1.
Step 1: Let's Learn
Read it, or press Listen and follow the words.
Always ask the same question
How many more does this number need to make ten? Then take that many.
First ten
The rest
8 needs 2 more to make ten. Take 2 from the 5.
First number
Second number
Eight needs two
Eight is two short of ten, so two move across. The amount you move is always the gap to ten — that is the whole rule.
Your ten partners tell you how many to move
Knowing 8 needs 2 is a ten-partner fact. This method is that fact being used.
Step 2: Try It Yourself
Tap and try it out.
First ten
The rest
8 needs 2 more to make ten. Take 2 from the 5.
Step 3: Watch an Example
One step at a time.
Watch Leo Make Ten From Eight
Leo works out 8 + 6.
- Step 1
He asks: how many more does 8 need? Two.
Step 4: Your Turn
Practice makes it stick.
Bookshelf
Problem 1 of 1
There are 8 books on one shelf and 7 on another. How many books in all?
books
Eight Plus Something
Give 8 the two it needs.
1 of 3
8 + 4 = ?
2 of 3
8 + 8 = ?
3 of 3
7 + 5 = ?
Step 5: Quick Check
Show what you know.
Question 1 of 2
8 + 5 = ?
Question 2 of 2
8 + 9 = ?
What You Learned
- The make-ten move works from any number.
- Ask how many more it needs.
- Take that many from the other number.