Lesson 1 5 mental math review
- 1. Name _____________________________ Date ________________ Mrs. Labuski / Mrs. Rooney Period ______ Mental Math Review Solve using the distributive property 9. 3(2 + 5) 10. 4(3 + 6) 11. 5(7 + 4) 12. 6(6 + 5)
- 2. Solve using the distributive property 9. 4(2 + 5) 10. 3(9 + 2) 11. 7(7 + 6) 12. 8(3 + 6)
- 3. Name _____________________________ Date ________________ Mrs. Labuski / Mrs. Rooney Period ______ Mental Math Review 8 + 12 = 12 + 8 (9 x 6) x 4 = 9 x (6 x 4) (3 x 5) = (3 x 2) (2 x 4) = (2 x 5) Solve using the distributive property 9. 3(2 + 5) 10. 4(3 + 6) (3 x 2) + (3 x 5) (4 x 3) + (4 x 6) 6 + 15 12 + 24 21 36 11. 5(7 + 4) 12. 6(6 + 5) (5 x 7) + (5 x 4) (6 x 6) + (6 x 5) 35 + 20 36 + 30 55 66
- 4. associative commutative distributive commutative associative commutative; y = 16 associative; n = 3 distributive; a = 14 distributive; b = 6 Solve using the distributive property 9. 4(2 + 5) 10. 3(9 + 2) (4 x 2) + (4 x 5) (3 x 9) + (3 x 2) 8 + 20 27 + 6 28 33 11. 7(7 + 6) 12. 8(3 + 6) (7 x 7) + (7 x 6) (8 x 3) + (8 x 6) 49 + 42 24 + 48 91 72