Addition and Subtraction Concepts

The video tutorial covers various methods for adding and subtracting two-digit numbers, including making a ten, using place values, and counting on and back. It also explores solving word problems and using repeated reasoning for calculations. The tutorial concludes with alternative methods for achieving a sum and introduces the next lesson on ordering objects by length.

What is the sum of 9 and 4 when using the 'make a ten' strategy?

• 15

• 14

• 13

• 12

How many tens are there in the sum of 20 and 40?

• 5

• 4

• 7

• 6

What is the result of adding 31 and 15 using place values?

• 47

• 46

• 45

• 44

If you add 10 using a hundred chart, what direction do you move?

• Right

• Left

• Down

• Up

What is the result of subtracting 1 repeatedly from 14 five times?

• 11

• 8

• 9

• 10

Emma has 12 hats, and Tim has 5 more than Emma. How many hats does Tim have?

• 16

• 17

• 18

• 15

Which of the following pairs of numbers add up to 45?

• 20 and 25

• 30 and 15

• 35 and 10

• 40 and 5

What should you do to improve your addition and subtraction skills?

• Practice regularly

• Only practice addition

• Only practice subtraction

• Avoid practicing