Mathematics
Addition & Subtraction
Procedural
6–7 yrs
Adding two two-digit numbers
两位数加两位数
Description
Add and subtract two two-digit numbers using concrete objects, pictorial representations, and mental methods
Mastery Evidence
- Calculate 34 + 27 using base-ten blocks or column addition
- Calculate 63 − 28 using a number line or partitioning
- Explain a strategy for adding or subtracting two two-digit numbers
Assessment Prompt
Can your child add or subtract two two-digit numbers — like '43 + 28' — using counters, a drawing, or working it out in their head?
