Question

1. 5 + 3 - 2
2. 20÷(2×2)
3. 21 - 10 + 4

Explanation:

Step1: Calculate 6 - 3 - 2

First, 6 - 3 = 3, then 3 - 2 = 1.

Step2: Calculate 20÷(2×2)

First, calculate the value inside the parentheses: 2×2 = 4, then 20÷4 = 5.

Step3: Calculate 21 - 10 + 4

First, 21 - 10 = 11, then 11+ 4 = 15.

Answer:

1. 1
2. 5
3. 15