Use PEDMAS for order of operation:
a: 100 – 8 × √25 + 3
First solve the root:
100 – 8 × 5 + 3
Next multiply:
100 - 40 + 3
Now solve from left to right:
100-40 = 60
60+3 = 63
Answer: 63
b. 100 – (11 – 4)² × 2
First parentheses:
100 - 7^2 x 2
Next the power:
100 - 49 x 2
Multiplication:
100 - 98 = 2
Answer: 2
