Break Apart Numbers for Mental Math Mastery

The video tutorial introduces the concept of breaking apart numbers to add using mental math. It explains how to decompose numbers into tens and ones to simplify addition. The teacher provides multiple examples, demonstrating different methods to achieve the same result. The lesson emphasizes using place value strategies to add numbers within 100, making mental calculations easier. Students are encouraged to practice these techniques to enhance their mental math skills.

What is the main objective of today's lesson?

• Multiply within 100 using place value strategies

• Subtract within 100 using place value strategies

• Divide within 100 using place value strategies

• Add within 100 using place value strategies

Tags

CCSS.2.NBT.B.7

What does breaking apart numbers mean?

• Dividing numbers by ten

• Multiplying numbers by ten

• Combining numbers into larger parts

• Separating numbers into parts

Tags

CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

How can you break apart 35 to make a ten when adding to 27?

• Break 35 into 3 and 32

• Break 35 into 10 and 25

• Break 35 into 5 and 30

• Break 35 into 7 and 28

Tags

CCSS.2.NBT.B.5

What is the result of 27 plus 35 using the first method?

• 62

• 52

• 57

• 67

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

How do you break apart 35 into tens and ones?

• Three tens and five ones

• Four tens and five ones

• One ten and twenty-five ones

• Two tens and fifteen ones

Tags

CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

What is the result of 27 plus 35 using the second method?

• 67

• 62

• 57

• 52

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the first step in adding 17 and 52 using the second method?

• Add 17 and 20

• Add 17 and 5

• Add 17 and 50

• Add 17 and 2

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the result of 17 plus 52?

• 70

• 69

• 72

• 67

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

How do you break apart 23 when adding to 69?

• Four tens and three ones

• One ten and thirteen ones

• Three tens and two ones

• Two tens and three ones

Tags

CCSS.2.NBT.B.6

What is the result of 69 plus 23?

• 95

• 92

• 98

• 89

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5