➕ Addition Within 100
Master adding two-digit numbers using Ontario Grade 2 place value strategies. This quiz covers decomposing numbers into tens and ones, regrouping when ones sum to 10 or more, using mental addition strategies, and building fact fluency for sums up to 20. **What you'll learn:** - Break down two-digit numbers into tens and ones - Add numbers by combining tens separately from ones - Regroup when the ones column adds to 10 or more - Use mental math strategies for quick addition - Build fluency with basic addition facts
Questions in this quiz
Answers hidden — play to find out.
- Question 1
When you add , what do you get when you add just the tens place first?
- Question 2
What is using place value strategy?
- Question 3
When you add , the ones column () equals 12, so you need to regroup by carrying 1 ten to the tens place.
- Question 4
What is when you regroup?
- Question 5
When adding , which is a mental math strategy that works well?
- Question 6
The number 35 can be broken down as 3 tens and 5 ones.
- Question 7
If you add using your fact fluency, what is the sum?
- Question 8
What is the ones digit in the answer to ?
- Question 9
When you use place value blocks to solve , how many tens rods do you have altogether?
- Question 10
- Question 11
What is using place value addition?
- Question 12
When adding , where does regrouping happen?
- Question 13
Using the mental math strategy of 'counting on,' what is ?
- Question 14
To solve using place value, you only add the ones and ignore the tens.
- Question 15
What is the sum of ?
- Question 16
If you decompose 28 into place value, you get _____ tens and _____ ones.
- Question 17