Adding and Subtracting Multiples of 10 with a Numbers Chart

This video tutorial teaches how to add and subtract multiples of 10 using a number chart. It covers counting by tens, adding tens to two-digit numbers, making larger jumps with tens, and using game cards for practice. The tutorial also explains counting backwards by tens and subtracting tens from two-digit numbers, with examples and strategies for making larger jumps in subtraction.

What happens to the tens digit when you add 10 to a two-digit number?

• It increases by one.

• It doubles.

• It stays the same.

• It decreases by one.

If you start at 40 and add 20, what number do you land on?

• 80

• 70

• 60

• 50

How many tens are in a jump of 30?

• One

• Two

• Four

• Three

If you start at 29 and add 40, what number do you land on?

• 89

• 59

• 79

• 69

When subtracting 10 from a two-digit number, what happens to the ones digit?

• It becomes zero.

• It increases by one.

• It stays the same.

• It decreases by one.

If you start at 70 and subtract 20, what number do you land on?

• 50

• 60

• 40

• 30

What is the result of 82 minus 40?

• 42

• 52

• 82

• 62