Question

Arthur used a calculator to evaluate an expression and got a result of 10. Which expression did Arthur evaluate? Arthur evaluated 20 ÷ (5 × 2 – 6) + 8. Arthur evaluated (20 ÷ 5) × 2 – 6 + 8. Arthur evaluated 20 ÷ (5 × 2) – 6 + 8. Arthur evaluated (20 ÷ 5) × (2 – 6) + 8.

Answer 1

20 ÷ (5 × 2 - 6) + 8=20:(10-6)+8=20:4+6=5+6=11

(20 ÷ 5) × 2 – 6 + 8=4*2-6+8=8-6+8=2+8=10

20 ÷ (5 × 2) – 6 + 8=20:10-6+8=2-6+8=-4+8=4

(20 ÷ 5) × (2 – 6) + 8=4*(-4)+8=-16+8=-8