What does the equals sign (=) signify in an arithmetic expression?

It shows the relationship between the two sides of the expression, indicating that they represent the same value.

Riddle: I am a number that when added to 2 gives you 15. What number am I?

13

True or False: The expression 13 - 2 is less than 4 × 3.

Left side:
13−2=11

Right side:
4 × 3 =12

Now compare:
11<12 is True

What is the significance of brackets in mathematical expressions?

Brackets indicate that the operations inside them should be performed first, clarifying the order of operations in complex expressions.

True or False: The expression 83 - 14 can be simplified to 83 + (-14).

True.

Riddle: I represent the sum of two terms, where one term is a multiplication of 6 and 5, and the other is 3. What am I?

The expression (6 × 5) + 3.

= 30+3

= 33

Identify the terms in the expression 2 - 10 + 4 × 6.

The terms are 2, -10, and 4 × 6.

What is the result of the expression 100 ÷ 2 + 4 when evaluated correctly?

The expression evaluates to 54, as 100 ÷ 2 equals 50 and adding 4 gives 54.

Explain how the associative property helps when evaluating (–7) + 10 + (–11).

→ (–7 + 10) + (–11)

 = 3 + (–11) = –8
→ (–7) + (10 + –11) 

= –7 + (–1) = –8

Compare the expressions and use the correct symbol (<, >, or =):
6 × 5 + 3 ___ 4 × 7 + 5

Left: 30 + 3 = 33
Right: 28 + 5 = 33

Both Sides are Equal.

6 × 5 + 3 = 4 × 7 + 5

True or False:
In the expression –18 + (–3) + 7, changing the order of terms affects the final value.

False
Reason: Due to the commutative and associative properties of addition, order does not matter.

Simplify the expression

(5 + 3) × (12 – 9) – [4 + (2×3)]

8 × 3 – [4 + 6] = 24 – 10 = 14