Let's solve each part of the question step by step.
(b) 289 17 ร ( 112 โ 78 ) โ
Calculate the expression inside the parentheses:
112 โ 78 = 34
Substitute back into the expression:
17 ร 34
Multiply:
17 ร 34 = 578
Divide by 289:
289 578 โ = 2
So, the result of part (b) is 2.
(d) ( 10 700 โ ) โ ( 34 โ 10 12 ร 8 โ )
Calculate the first part:
10 700 โ = 70
Calculate the second part inside the curly braces:
(a) Multiply inside the parentheses: 12 ร 8 = 96 (b) Subtract inside the denominator: 34 โ 10 = 24 (c) Divide the results: 24 96 โ = 4
Subtract the results from step 1 and step 2c:
70 โ 4 = 66
Thus, the result of part (d) is 66.