Understanding Addition with Hundreds Chart

This video tutorial teaches how to use a hundreds chart for addition. It explains decomposing numbers and demonstrates the commutative property of addition through examples involving crayons and marbles. The video shows how to add numbers by moving vertically and horizontally on the chart, emphasizing that the order of addends does not affect the sum.

What is the purpose of using a hundreds chart in this lesson?

• To explore division

• To learn multiplication

• To understand subtraction

• To practice addition

How can the number 23 be decomposed?

• Into 15 and 8

• Into 20 and 3

• Into 5 and 18

• Into 10 and 13

When adding 46 and 15 using a hundreds chart, what is the first step?

• Add 5 ones

• Multiply by 2

• Locate 46 on the chart

• Subtract 10

What is the sum of 46 and 15 using the hundreds chart?

• 81

• 71

• 51

• 61

What does the commutative property of addition state?

• The sum changes with the order of addends

• Multiplication is commutative

• The sum remains the same regardless of the order of addends

• Addition is the same as subtraction

If your friend has 58 marbles and you give her 34 more, how many marbles does she have now?

• 112

• 102

• 92

• 82

What is the first step in adding 34 and 58 using a hundreds chart?

• Multiply by 2

• Locate 34 on the chart

• Add 8 ones

• Subtract 10

What is the sum of 34 and 58 using the hundreds chart?

• 112

• 82

• 102

• 92

What is the final sum when adding 58 and 34 using the hundreds chart?

• 82

• 92

• 112

• 102

What key concept is reinforced in the conclusion of the lesson?

• The order of addends affects the sum

• Subtraction is commutative

• The order of addends does not affect the sum

• Addition is the same as multiplication