This video tutorial teaches how to add and subtract multiples of ten using a numbers chart. It covers counting by tens, adding and subtracting tens from two-digit numbers, and making larger jumps in addition and subtraction. The tutorial emphasizes that the ones digit remains unchanged when adding or subtracting tens.

What is the result of adding 10 to 49?

• 59

• 69

• 79

• 39

If you start at 40 and add 20, where will you land?

• 80

• 70

• 60

• 50

What is the sum of 45 plus 30?

• 95

• 65

• 85

• 75

If you start at 29 and add 40, where will you land?

• 89

• 59

• 69

• 79

What happens to the tens digit when you subtract 10 from 57?

• It stays the same

• It doubles

• It increases by 1

• It decreases by 1

What is the result of 34 minus 10?

• 24

• 44

• 54

• 14

If you start at 70 and subtract 20, where will you land?

• 50

• 30

• 60

• 40

How many tens are subtracted when you make a jump of 30?

• 4

• 2

• 1

• 3

What is the result of 82 minus 40?

• 72

• 62

• 52

• 42

What is the result of subtracting 20 from 82?

• 42

• 52

• 72

• 62