Mastering Missing Number Problems in Addition and Subtraction

The video tutorial explains how to use number family triangles to find missing numbers in addition and subtraction problems. It demonstrates solving an addition problem by subtracting a known number from the total to find the missing number. Similarly, it shows solving a subtraction problem by adding the two known numbers to find the larger number. The tutorial emphasizes understanding the relationship between addition and subtraction in number family triangles.

What is the purpose of using a number family triangle in the given problem?

• To compare numbers

• To multiply numbers

• To divide numbers

• To find a missing number

Tags

CCSS.2.OA.C.4

In a number family triangle, what operation can be used to find a missing bottom number?

• Multiplication

• Division

• Addition

• Subtraction

Tags

CCSS.2.OA.C.4

What is the first step in finding the missing number when subtracting 24 from 82?

• Subtract 20

• Subtract 5

• Subtract 10

• Subtract 15

Tags

CCSS.1.NBT.C.5

After subtracting two tens from 82, what number do you get?

• 42

• 72

• 62

• 52

Tags

CCSS.1.NBT.C.5

What is the final answer after subtracting 24 from 82?

• 58

• 56

• 62

• 60

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

How can you verify that 58 plus 24 equals 82?

• By adding 58 and 24

• By subtracting 24 from 82

• By multiplying 58 and 24

• By dividing 82 by 24

Tags

CCSS.2.NBT.B.5

In a subtraction problem, what is the larger number in a number family triangle?

• The number on the left

• The number at the bottom

• The number at the top

• The number in the middle

Tags

CCSS.7.NS.A.1C

What are the two numbers given at the bottom in the subtraction problem?

• 24 and 58

• 32 and 70

• 32 and 38

• 38 and 70

Tags

CCSS.2.NBT.B.7

What is the result of adding 38 and 32?

• 72

• 70

• 68

• 60

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the top number in the number family triangle for the subtraction problem?

• 70

• 38

• 58

• 32

Tags

CCSS.2.NBT.B.5