7th grade maths -sets , integers and algebraic expressions

are you ready

• yeah

• yes

• no

• mabey

Which symbol in sets represents 'Whole Numbers'

It is a collection of well-defined group of objects.

• Element

• Set

• Cardinality

• Universal Set

If A = { 4, 5, 6 }, then which of the following is true

• { 5 } ∈ A

• ∅ ∈ A

• 6 ∈ A

• 5 ⊂ A

If A, B we disjoint sets then and n(A) = 12, n(B) = 8, then n(A ⋃ B)

• > 20

• < 20

• = 20

• ≤ 20

Which of the following is empty set ?

• {∅}

• { x : x ∈N, 10 < x < 11}

• {x : x is an even prime number}

• { x : x is solution of 2x + 3 = 3 }

Order from smallest to greatest:

8, 4, -5, 12, -14, 3

• 3, 4, -5, 8, 12, -14

• -14, -5, 3, 4, 8, 12

• 12, -14, -5, 3, 4, 8

• -5, -14, 3, 4, 8, 12

1. Select the correct option from the following.

• On a number line when we add a positive integer we move to the left

• On a number line when we add a positive integer we move to the right.

• On a number line when we add a negative integer we move to the right.

• On a number line when we subtract a positive integer we move to the right.

3. (-8) + (-4) = ?

• -4

• 4

• -12

• 12

11. (-12) - (-8) = ?

• 4

• -4

• 20

• -20