Question

210÷[5+16÷2{6−18÷(7+2)}]−15​

Answer 1

Step-by-step explanation:

210 ÷ [ 5 + 16 ÷ 2 { 6 - 18 ÷ ( 7 + 2 ) } ] - 15

210 ÷ [ 5 + 16 ÷ 2 { 6 - 18 ÷ 9 } ] - 15

210 ÷ [ 5 + 16 ÷ 2 { 6 - 2 } ] - 15

210 ÷ [ 5 + 16 ÷ 2 { 4 } ] - 15

210 ÷ [ 5 + 16 ÷ 8 ] - 15

210 ÷ [ 5 + 2 ] - 15

210 ÷ 7 - 15

30 - 15

15

$...$

Answer 2

Answer:

$-\frac{345}{37}$

Step-by-step explanation:

Just follow the order of operations

210÷[5+16÷2{6−18÷(7+2)}]−15  

= 210÷[5+16÷2{6−18÷9}]−15   (calculate 7+2)

= 210÷[5+16÷2{6−2}]−15 (calculate 18÷9)

= 210÷[5+16÷2{4}]−15  (calculate 6-4)

= 210÷[5+16÷2×4]−15

= 210÷[5+8×4]−15  (calculate 16÷2)

= 210÷[5+32]−15  (calculate 8×4)

= 210÷[37]−15  (calculate 5+32)

= 210÷37−15

= 210÷37−(15×37)÷37  (put on the same denominator)

= 210÷37−555÷37  (calculate 15×37)

= (210−555)÷37

=-345÷37   (calculate 210-555)