Subtraction Concepts and Techniques

Mrs. Schneider teaches subtraction within 20 using fingers and counting backwards. The lesson includes practice counting down from 20, using a number line, and solving subtraction problems with fingers. Students learn to subtract by counting back and are encouraged to practice with boom cards.

What is the first step in subtracting using your fingers?

• Count backward from zero

• Put the larger number in your head

• Count forward from the larger number

• Put the smaller number in your head

How do you use a number line to subtract?

• Count backward to zero

• Count backward from the larger number

• Count forward to the larger number

• Count forward from zero

If you start at 10 and count back 7, what number do you end on?

• 6

• 5

• 4

• 3

What is 19 minus 6 using the finger counting method?

• 12

• 13

• 15

• 14

When subtracting 16 minus 9, what is the result?

• 5

• 7

• 8

• 6

What is the result of 18 minus 4?

• 15

• 12

• 13

• 14

How many fingers do you put up when subtracting 19 minus 1?

• 1

• 3

• 2

• 4

What is the result of 17 minus 8?

• 8

• 9

• 11

• 10

What is the result of 14 minus 7?

• 9

• 8

• 7

• 6

What is the result of 13 minus 5?

• 10

• 7

• 9

• 8