Mastering Fast Mental Addition Techniques

What is the main topic discussed in the video?

• Geometry basics

• Division shortcuts

• Multiplication techniques

• Mathematical complements

Tags

CCSS.3.OA.A.1

What is the complement of the number 3?

• 6

• 7

• 9

• 8

Which pair of numbers are complements to make 10?

• 4 and 5

• 2 and 9

• 6 and 4

• 3 and 8

Tags

CCSS.2.OA.C.3

What is the complement of the number 7?

• 2

• 3

• 4

• 5

How far is the number 16 from 20?

• 2

• 3

• 5

• 4

Tags

CCSS.2.MD.B.6

What is the complement of the number 12 to reach 20?

• 9

• 8

• 7

• 6

Tags

CCSS.1.OA.C.6

How far is the number 31 from 40?

• 7

• 9

• 10

• 8

What is the complement of the number 37 to reach 100?

• 53

• 63

• 73

• 83

Tags

CCSS.1.NBT.C.5

How far is the number 45 from 100?

• 55

• 65

• 75

• 45

What is the complement of the number 76 to reach 100?

• 34

• 24

• 14

• 44

Tags

CCSS.2.NBT.B.8