Repeated Subtraction
Show 4 ÷ 2 using repeated subtraction.
4 - 2 = 2
2 - 2 = 0
So 4 ÷ 2 = 2
What shape has 3 sides?
What is a Triangle?
Show 8 ÷ 2 = 4 using repeated subtraction.
8 - 2 = 6
6 - 2 = 4
4 - 2 = 2
2 - 2 = 0
(four total subtraction sentences, so 8 ÷ 2 = 4)
Show 6 x 3 = 18 using an array.
(teacher will look at array to determine accuracy)
What is the name of a figure with 6 sides?
What is a Hexagon?
Show 6 ÷ 2 using repeated subtraction.
6 - 2 = 4
4 - 2 = 2
2 - 2 = 0
So 6 ÷ 2 = 3
What is 10 - 6?
What is 4?
Show 10 ÷ 5 = 2 using repeated subtraction.
10 - 5 = 5
5 - 5 = 0
(two total subtraction sentences, so 10 ÷ 5 = 2)
Show 4 x 4 using an array.
Answer should be an array with 4 rows and 4 columns.
What is 6 x 8?
What is 48?
Show 9 ÷ 3 using repeated subtraction.
9 - 3 = 6
6 - 3 = 3
3 - 3 = 0
So 9 ÷ 3 = 3
If the little hand of a clock is on 3, and the big hand is on 12, what time is it?
What is 3 O'clock?
Show 21 ÷ 7 = 3 using repeated subtraction.
21 - 7 = 14
14 - 7 = 7
7 - 7 = 0
(three total subtraction sentences, so 21 ÷ 7 = 3)
Show 5 x 5 using an array.
Answer should be an array with 5 rows and 5 columns.
What is the value of the 2 in 420?
What is 20?
Show 2 ÷ 1 using repeated subtraction
2 - 1 = 1
1 - 1 = 0
So 2 ÷ 1 = 2
What is an Octagon?
Show 35 ÷ 5 = ? using repeated subtraction.
35 - 5 = 30
30 - 5 = 25
25 - 5 = 20
20 - 5 = 15
15 - 5 = 10
10 - 5 = 5
5 - 5 = 0
(seven total subtraction sentences, so 35 ÷ 5 = 7)
Show 12 x 2 = 24 using an array.
Answer should be an array with 6 rows and 2 columns or 2 rows and 6 columns.
Ms. Smith has 10 tables in her classroom. There are 3 students at each table. How many students are in her classroom?
What is 30?
Show 12 ÷ 3 using repeated subtraction
12 - 3 = 9
9 - 3 = 6
6 - 3 = 3
3 - 3 = 0
So 12 ÷ 3 = 4
What is 15 + 15?
What is 30?
Show 16 ÷ 2 using repeated subtraction.
16 ÷ 2 = 8
16 - 2 = 14
14 - 2 = 12
12 - 2 = 10
10 - 2 = 8
8 - 2 = 6
6 - 2 = 4
4 - 2 = 2
2 - 2 = 0
So 16 ÷ 2 = 8
Show 10 x 3 using an array
(teacher will look at array to determine accuracy)
What does a trapezoid look like? (draw it on the board)
*picture of a trapezoid*