Evaluate $47-13$47−13
Evaluate $30-19-10$30−19−10
Find the value of $867-311$867−311
Evaluate $1008-167$1008−167.
Solve problems involving the addition, subtraction, and multiplication of whole numbers, using a variety of mental strategies (e.g., use the commutative property: 5 x 18 x 2 = 5 x 2 x 18, which gives 10 x 18 = 180)