Order of Operations
A way to remember order of operations.
What is GEMS?
What is PEMDAS?
The answer to (-3) + (-5)
What is -8?
Name all Prime numbers between 4 and 18
5,7,11,13,17
I need to have a common denominator to do the operations of ___________ and ____________.
addition and subtraction
123.785
The answer to
3 + 12 x 4 - 23
What is 43?
7 + (-20)
what is -13?
Write 90 as a product of primes
2 x 32 x 5
1 3/4 - 3/5
1 3/15 or 1 1/5
Round to 4 significant figures: 145684
145700
33 + 2(5+6) - 41
33 + 2(5+6) - 41 = 45
(+9) - (-6) + (-6)
9
What is the highest common factor of 36 and 45?
9
21/40 x 2/3
AND SIMPLIFIED
42/120 --> 7/20
Write the number 304.5153 rounded to 3 d.p.
304.515
(3+5)2 + (12 x 2) - 4
What is 84?
(-1)15 x (-1)24
-1
What is the LCM of 9, 15, and 30
90
(3/7)2
9/49
Explain the concept of rounding
answers can vary
Add Brackets to make this true:
15 - 2 x 3 + 4 / 2 = 8
15 - 2 x (3 + 4) / 2 = 8
((-9) + (-3))2
144
A bell rings every 20 seconds and another bell rings every 25 seconds. A third bell rings every 30 seconds. If they all just rang, how many minutes will it be until they ring at the same time again?
5 minutes
6/7 + 1/3 x 2/7
18/21 + 2/21 = 20/21
How many significant figures does 1389000 have? would it change if I made it 1380009?
4 significant figures
yes it would become 7