Subtraction Concepts and Techniques

This video tutorial teaches how to use a hundreds chart for subtraction. It begins with an introduction to the concept, followed by a review of decomposing numbers into tens and ones. The video explains how numbers increase and decrease on a hundreds chart. Two examples are provided: one involving bees and another with toy cars, demonstrating subtraction using the chart. The tutorial also addresses common misunderstandings about the order of subtraction. The lesson concludes with a summary of the key points covered.

What does it mean to decompose a number?

• To multiply numbers

• To break a number into smaller parts

• To divide numbers

• To add numbers together

How do the ones change on a hundreds chart?

• They increase and decrease horizontally

• They increase and decrease diagonally

• They increase and decrease vertically

• They do not change

If a beehive has 76 bees and 24 fly away, how many are left?

• 52

• 50

• 54

• 56

What is the first step in subtracting using a hundreds chart?

• Divide the numbers

• Locate the number you are subtracting from

• Add the numbers

• Multiply the numbers

How do you subtract tens on a hundreds chart?

• Move horizontally

• Move vertically

• Move diagonally

• Do not move

Why is the order important in subtraction?

• Because subtraction is distributive

• Because the result changes if the order is reversed

• Because subtraction is associative

• Because subtraction is commutative

What is the result of 10 minus 7?

• 2

• 3

• 4

• 5

What is the result of 7 minus 10?

• 3

• -3

• 0

• 7

What is the result of 89 minus 58 using a hundreds chart?

• 35

• 31

• 29

• 33

What is the first step in subtracting 58 from 89?

• Add the numbers

• Multiply the numbers

• Subtract the tens first

• Subtract the ones first