Counting on and making ten both give the right answer.
Step 1: Let's Learn
Read it, or press Listen and follow the words.
When to count on
If the second number is 1, 2 or 3, counting on is quick.
When to make ten
If the second number is big, making ten is quicker.
A rule of thumb
Count on when the second number is one, two or three. Make ten when it is bigger and the first number is close to ten.
Both give the same answer
Choosing is about effort, not correctness. A slower method is not a wrong method.
Step 2: Try It Yourself
Tap and try it out.
First ten
The rest
9 needs 1 more to make ten. Take 1 from the 2.
Step 3: Watch an Example
One step at a time.
Watch Ben Choose
Ben is asked for 9 + 2, then 9 + 7.
- Step 1
For 9 + 2 he just counts on: ten, eleven. Done.
Step 4: Your Turn
Practice makes it stick.
Choosing a Way
Problem 1 of 1
Which would you rather do for 9 + 8?
Pick and Solve
Choose whichever way suits the numbers.
1 of 3
9 + 1 = ?
2 of 3
8 + 7 = ?
3 of 3
9 + 3 = ?
Step 5: Quick Check
Show what you know.
Question 1 of 2
8 + 2 = ?
Question 2 of 2
9 + 6 = ?
What You Learned
- Counting on suits a small second number.
- Making ten suits a big one.
- Both are correct. Pick the quicker one.