NES Elementary Education Subtest 2 Questions and answers 100% correct 2023

NES Elementary Education Subtest 2
Questions and answers 100% correct
2023
Natural Numbers - correct answer N = {1, 2, 3, 4, 5, 6, . . . }

Whole natural numbers together with zero. - correct answer W = {0, 1, 2, 3, 4, 5,
6, . . . }

Every whole number has a unique opposite or negative whose sum with it is 0. For
example, - correct answer 2 + (-2) = 0

The set of integers consists of the whole numbers and their opposites. - correct answer
Z = {. . ., -3, -2, -1, 0, 1, 2, 3, . . . }

Every nonzero integer has a unique reciprocal whose product with it is one. For
example, - correct answer 2 × 1/2 = 1

The ratio or fraction of one integer to a nonzero integer is the product of the first integer
with the reciprocal of the second. For example, the ratio of 2 to 3 is - correct answer
2/3 = 2 × 1/3

not every rational number is an integer. For example, 1/2 is a rational number that is not
an integer. - correct answer 1/2 = 0.5

There are three basic properties of addition: - correct answer commutativity,
associativity and identity.

Commutative property. - correct answer When adding two numbers, the sum is the
same regardless of the order in which the numbers are added.

2+3=3+2

Associative property. - correct answer When adding three or more numbers, the sum
is the same regardless of the way in which the numbers are grouped.

2 + (3 + 5) = (2 + 3) + 5

Identity property. - correct answer Adding zero to a number does not change it.

2+0=2

, There are three basic properties of multiplication: - correct answer commutativity,
associativity and identity.

Distributive property. - correct answer The product of a number with a sum equals the
sum of the products of the number with each term of the sum.
2 × (3 + 5) = (2 × 3) + (2 × 5)

Exponentiation - correct answer Exponentiation is repeated multiplication. An exponent
is often called a power. For example, the third power of 2 is
2³ = 2 × 2 × 2 = 8

We define the zero power of any nonzero number to be 1. For example, - correct
answer (-3)0 = 1

A negative exponent indicates a reciprocal. For example, - correct answer 2 (-3rd
power) = (3rd power) =

The first power of any number is itself. For example, - correct answer 2 (to the 1st
power) = 2

To multiply like bases with exponents, add the exponents. For example, - correct
answer 2 (to the 3rd) x 2 (to the 5th) = 2 (to the eighth)

To exponentiate a power, multiply the exponents. For example, - correct answer (2 to
the 3rd) to the 5th = 2 to the 15th

10 to the 0 power - correct answer 1

10 to the 1 power - correct answer 10

10 to the -2 power - correct answer to the 2 power or

10 to the 2 power x 10 to the 3 power - correct answer 10 to the 5 power

Identifying Place Value in Numbers
2045 - correct answer 2045 = (2 x 10 to the 3 power) + (0 x 10 to the 2 power) + (4 x
10 to the 1 power) + 5 x 10 to the 0 power)

Digits to the right of a decimal point correspond to negative powers of ten. For example,

23.405 - correct answer 23.405 = (2 x 10 to the 1 power) + (3 x 10 to the 0 power) + (4
x 10 to the -1 power) + (0 x 10 to the -2 power) + (5 x 10 to the -3 power)

Converting a fraction to a decimal. For example 3/8 - correct answer 3 divided by 8 =
0.375