Math Intervention 3–5 Grade

Addition and Subtraction Concepts 63

Successful Strategies

One of the foundational concepts associated with adding
and subtracting tens is rational counting by tens. Encourage
students to skip count by tens beginning with zero and
with numbers other than zero. To further help students
understand the adding and subtracting tens concept, use base
ten manipulatives or drawings to model the computation.

tens, add, addition,

subtract, subtraction,

minus sign, plus sign

Math Words to Use

Questions at Different Levels of Cognitive Demand

Recall: What is 53 + 10?

Comprehension: How do you add ten to a number?

Application: How would you use 92 – 10 to solve

92 – 20?

Analysis: Which facts go together? Why?

Evaluation: How does skip counting help us add and

subtract ten?

Synthesis: How could you use the adding and

subtracting tens concept to add and subtract nines?

EASY

COMPLEX