Spiraling Review
56
Parentheses
3 + 4 x 2
11
What do the brackets indicate in the expression?
46 - 2 x [(6 + 6) / 3]
Solve 12 / 3 before multiplying by 2
Is 1 a prime or composite number?
Neither!
Write the following number in expanded notation:
623.891
(6 x 100) + (2 x 10) + (3 x 1) + (8 x 0.1) + (9 x 0.01) + (1 x 0.001)
What do we solve first according to the order of operations: parentheses or multiplication?
Parentheses!
(5 - 2) x 3 + 7
18
Which choice gives the correct order of operations needed to find the value of the expression below?
27 / (7 - 4) + 2 x 5
A. -, / , +, x
B. -, /, x, +
B. - first, then /, then x, and finally +
True or False:
All numbers have two factors: 1 and themselves.
True!
3.28 + 4.305
7.585
What do we solve first according to the order of operations: multiplication or addition?
Multiplication
8 + 6 / 2 - 1
(/ = dividing)
10
Jude and Gunner earned money for completing chores.
- Jude earned $14 washing dishes and $25 washing clothes.
- Jude earned 3 times as much as Gunner.
- Gunner spent $2 of his earnings.
What expression can be used to determine that Gunner had $11 of his earnings left?
(14 + 25) / 4 - 2 = 11
What is a prime number?
A number that only has 2 factors: 1 and itself.
Order the following decimals from least to greatest:
0.679, 0.967, 0.367, 0.045677
0.045677, 0.367, 0.679, 0.967
What do we solve first according to the order of operations: multiplication or division?
We solve whatever comes first when solving the equation from left to right.
2 x (9 - 5) + 8 / 2
(/ = dividing)
12
Four students evaluated this numerical expression:
40 - [(30 / 5) x 3]
a) Chandler´s answer was 102
b) Raina´s answer was 6
c) Emma´s answer was 22
d) Sophia´s answer was 58
Which student gave the correct response?
Emma
What are the factors for 12? Is it prime or composite?
1 x 12
2 x 6
3 x 4
Composite! Because it has more than two factors.
Round the decimal to the nearest tenth
5.698
5.7
Why are the M and the D (and the A and the S) on the same level in the PEMDAS chart?
Because you solve multiplication or division at the same time, starting with the one that comes first. This is the same case for addition and subtraction.
12 / [(3 + 1) + 5 - 6]
(/ = dividing)
4
Two students in a math competition placed grouping symbols in the following expression:
3 x 4 + 3 x 5
Maggie: (3x4) + (3x5)
Sabrina: 3 x (4 + 3) x 5
Which student created the expression with the least value?
Maggie
27 < 105
What are the factors of 11? Is it prime or component?
Factors of 11: 1 x 11
It is prime!