A line produced 1,140 units over 10 hours. What is the output per hour?

Rate = quantity ÷ the units named (per hour, per worker…). Check which divisor the question asks for. The correct answer is 114. Traps to avoid: 1,140 comes from the "gave total" error; 11,400 comes from the "multiplied" error; 104 comes from the "wrong divisor" error; 9 comes from the "inverted" error.