Finding 10 to Add and Subtract Quickly

The video tutorial introduces the concept of using the number 10 to simplify addition and subtraction problems. It explains how to recognize combinations that make 10 and use them to solve math problems more efficiently. The tutorial includes examples and exercises to practice these techniques, emphasizing the importance of memorizing ways to make 10 for quick calculations. The video concludes with a summary of the strategies learned and encourages continued practice.

What is a 'fact family' in the context of making 10?

• A group of numbers that add up to 10

• A set of numbers that can be multiplied to get 10

• A set of numbers that are all prime

• A group of numbers that are all even

How can you quickly solve 9 + 7 using the concept of making 10?

• By adding 9 and 7 directly

• By splitting 7 into 1 and 6, then adding 9 + 1

• By subtracting 7 from 9

• By multiplying 9 and 7

Latiffa has 7 stickers and gets 5 more. How can you use making 10 to find the total?

• Multiply 7 and 5

• Split 5 into 3 and 2, then add 7 + 3

• Add 7 and 5 directly

• Subtract 5 from 7

What is the first step in solving 15 - 8 using the concept of making 10?

• Find 15 - 5 to make 10

• Subtract 8 directly from 15

• Multiply 15 and 8

• Add 8 to 15

Will has 14 rocks and gives 6 away. How can you use making 10 to find how many rocks he has left?

• Add 6 to 14

• Multiply 14 and 6

• Find 14 - 4 to make 10, then subtract 2

• Subtract 6 directly from 14

What is the benefit of memorizing the 'ways to make 10'?

• It helps in finding prime numbers

• It helps in dividing numbers

• It helps in multiplying numbers

• It helps in quickly adding and subtracting numbers

How can you quickly add 10 to a number smaller than 10?

• By subtracting the smaller number from 10

• By changing the 0 in 10 to the smaller number

• By multiplying the numbers

• By adding the numbers directly