Math Assessment (1)

• Every verticle row increases by ten
• Diagonal increases by 11

• A way of instantly counting
• There are two types: Perceptual and Conceptual

Recognizing by appearance

Understanding that different numbers make a sum

• Problem Solving
• Reasoning and Proof
• Representation
• Communication
• Connections

• counting strategies, direct modeling/counting on
• reasoning strategies, properties
• mastery

• "borrowing method"
• regrouping
• typical subtraction

This methos is based upon the idea that adding the same amount to two different numbers will not change the difference between the numbers

Also known as the additions method. The answer is found by directly relating the answer to addition.

• Grade K-1: expose to patterns
• Grade 2: group of tens/connected to place value
• Grade 3-4: introduction to decimals
• Grade 4-5: extended decimals

• Counting by ones: one-to-one correspondence
• Counting by groups/singles
• Counting by tens/ones

an idea of abstraction that represents quanity

symbols representing numbers

First number in a subtraction problem

Second number in a subtraction problem

= subtraction