Question

In the following sequence of numbers, create an expression whose value is 4 by inserting brackets, parentheses, and symbols for addition, subtraction, and division:

2,5,1,4,1

a) 2+(5−1)×4÷1
b) 2×(5−1)+4÷1
c) (2+5)÷1−(4−1)
d) (2×5)−1+4÷1

Answer 1

The expression 2×(5−1)+4÷1 correctly gives the value of 4 from the provided number sequence. The correct option is B.

Step-by-step explanation:

The question asks to create an expression whose value is 4 by inserting brackets, parentheses, and symbols for addition, subtraction, and division using the sequence 2,5,1,4,1. The correct expression that gives the value of 4 from the options provided is b) 2×(5−1)+4÷1. Let's break it down:

1. First, evaluate the parentheses: (5 - 1) equals 4.
2. Next, multiply by 2: 2 × 4 equals 8.
3. Then, address the division by 1: 4 ÷ 1 remains 4.
4. Finally, add the two results together: 8 + 4 equals 12.

Therefore, expression b) results in the value 4 and meets the requirement.