Example: 5 x 4= ____5 groups of 4

4 + 4 + 4 + 4 + 4= 20

Example 2: 4 x 5= ____4 groups of 5

5 + 5 + 5 + 5= 20

Multiplication as Repeated Addition

4 5 x 4= 20X 520

4+ 4+4 +4 +4= 20

5 4 x 5 = 20X 420

5+5+5+5=20

Write the multiplication sentence using the given addition facts:

1. 3 + 3 + 3 + 3+ 3= 152. 15 + 15 + 15 =453. 21 + 21 = 424. 6 + 6 + 6 + 6 + 6 + 6 +6 = 425. 10 + 10 + 10 + 10 + 10= 50

Exercise:

Show the repeated addition for the following multiplication sentence:

1. 3 x 5=2. 6 x 2=3. 9x 3=4. 2 x 10=5. 4 x 8=

Example: 20 ÷ 4 = ____20- 4 - 4 - 4- 4- 4=0

How many times did we subtract 4 until we have 0? 5So 20 ÷ 4 = 5

Example: 20 ÷ 5= ____ 20 - 5 - 5 - 5 - 5 = 0How many times we subtracted 5 until 0?

4So 20 ÷ 5 = 4

Division as Repeated Subtraction

Example : 20 ÷ 5= 4 20 - 5 - 5 - 5 - 5 = 0

Correct: 20-5 = 15 wrong: 20- 4 =1615- 5= 10 16- 4= 1210- 5= 5 12- 4 = 85- 5= 0 8- 4 = 4

4-4 = 0

In repeated subtraction (illustrating division), the subtrahend is the divisor, not

the quotient.

Write the division sentence using the given subtraction facts:

1. 30- 3 - 3 – 3 – 3 – 3 – 3 – 3 – 3 – 3 – 3 = 0

2. 26- 13- 13 = 03. 48 – 12 – 12 – 12- 12= 04. 15 – 5 – 5- 5 = 05. 21 – 7 – 7 – 7 = 0