Understanding Basic Addition and Subtraction

The video tutorial covers various arithmetic strategies, including changing the order of addends, using doubles and near doubles, making a ten for addition and subtraction, counting on and back, and solving word problems. It emphasizes understanding through constructing arguments and using addition to aid subtraction.

What is the sum of 4 + 2 and 2 + 4?

• 7

• 8

• 6

• 5

If 9 + 3 equals 12, what does 3 + 9 equal?

• 14

• 12

• 11

• 13

What is the result of 6 + 4 and 4 + 6?

• 8

• 9

• 10

• 11

If 4 + 4 equals 8, what is 3 + 4?

• 6

• 7

• 8

• 9

What is one less than 16 if 8 + 8 equals 16?

• 15

• 14

• 17

• 16

What is the near double of 5 + 5?

• 9

• 12

• 10

• 11

How can you make a ten to add 8 + 6?

• 10 + 8

• 10 + 2

• 10 + 6

• 10 + 4

What is the sum of 8 + 4 using the make a ten strategy?

• 10

• 11

• 12

• 13

How do you find 11 - 4 by counting on?

• Count to 7

• Count to 5

• Count to 8

• Count to 6

What is the result of counting back from 11 to subtract 4?

• 7

• 6

• 8

• 9