Year 2
Maths
Number and Algebra
AC9M2N04
Addition to 100
Students add two-digit numbers using place value strategies and mental methods.
What You Need to Know
Students add two-digit numbers using place value strategies and mental methods.
Key Concept Diagram
Adding tens and ones separately
Bridging through ten
Using number lines to add
Checking answers by counting on
Key Vocabulary
addend
a number being added to another
sum
the result of adding two or more numbers
regroup
to exchange ten ones for one ten
place value
the value of a digit based on its position
Knowledge Check
Select the correct answer for each question. Click "Check Answer" to see if you are right.
Question 1
What is 34 + 25?
Question 2
What is 47 + 36?
Question 3
What is 61 + 28?
Key Concepts Summary
- ●Adding tens and ones separately
- ●Bridging through ten
- ●Using number lines to add
- ●Checking answers by counting on