Divisibility Rule For 3

Textbook number 5

Write each addition statement shown by the fraction strips. Estimate the answer, and then add.

a. 1/3 + 1/3 = 2/3

b. 2/6 + 1/6 = 3/6 = 1/2

c. 2/4 + 1/4 = 3/4

Adding Fractions with Like Denominators

You could simplify them. 4/9 + 2/9 = 6/9 or 2/3 <--(Simplified)

The denominators stay the same. Only the numerator adds.

1/4 + 2/4 = 3/4

Eg. 1/3 + 1/3 = 2/3

3/8 + 5/8 = 8/8 or 1

The Divisibility rule for 8

- All numbers that are divisible by 2, three times

8 = 2 x 2 x 2

eg. 24÷2 = 12, 12÷2 = 6, 6÷2 = 3

- 24 is divisible by 8

page 215 question 11

Carl and Mark shovelled the snow from
Mark’s driveway.
Mark shovelled 4/9 of
the driveway.
Carl shovelled 5/9 of
the driveway.
Did the boys shovel the whole driveway?
Explain how you know.
yes because 4/9+5/9=9/9 or 1whole

Divisibility Rules for 9

The sum of the digit is divisible by 9

Eg. Is 983 142 divisible by 9? Let's find out

9+8+3+1+4+2 = 27

Add all the numbers up and then you will get sum

27 is divisible by 9

So, that means 983 142 is divisible by 9

order of operations

B - brackets
E - exponents
D - division
M - multiplication
A - addition
S - subtraction