6. Evaluate: {30 x [ 4 + (8 - 3)] + 10}
A.7
B. 17
C. 27
7. Simplify: 86 - 2x{3+ 15 + [17 - 3x(18 - 15) - 3]}
A. 47
B. 67
C. 74
8. Find the sum of (+92) + (-83).
A. 9
B. 12
C. 17
9. What is -9 474 decreased by +6 188?
A. -15 662
B. 15 662
C. -3 286
10. Subtract 8 976 from -10 548.
A. -19 524
B. 19 524
C.-1572
D. 21
D. 3 286
D. 1 572​