University:
High School
Course:
High School Mathematics
Academic year:

2023
Views:

252

Pages:

2
Author:

anon

Mastcry #1 – Solutions [1,1,2] 1. (− 7)(4) =− 28 2. − 54 9 = −6 3. (− 8)(3)(− 2)(− 1) = (− 24)(+ 2) =− 48 [3,1,1] 4. −6 × 4 × −1 3 × 2 × −2 = 24 −12 =− 2 5. (− 3) + (− 5) =− 3 − 5 =− 8 6. − 17 + 24 = 7 [2,2,2] 7. − 4 − (− 9) − (+ 1) =− 4 + 9 − 1 = 9 − 5 = 4 8. 22 − 17 + 5 − 2 = 22 + 5 − 17 − 2 = 27 − 19 = 8 9. 4 + 3 ×(− 5) = 4 − 15 =− 11 [3,3,2] 10. −24 3 − −18 6 =− 8 − (− 3) =− 8 + 3 =− 5 11. 5(17 − 15) + 2(− 8 − 3) = 5(2) + 2(− 11) = 10 − 22 =− 12 12. 6 + 2(8 − 13) − 4 = 6 + 2(− 5) − 4 = 6 − 10 − 4 = 6 − 14 =− 8 2 [2] 13. 7 − 3 + 8 = 7 − 3 × 3 + 8 = 7 − 9 =− 2 Evaluate using the given values. [2,3] 14. A-2b+3c, if a=9, b=-2 and c=-1 =9-2(-2)+3(-1) =9+4-3 =13-3 =10 2 2 15. 𝑎 − 2𝑏 , if a=-5 and b=4 2 2 = (− 5) − 2(4) = (− 5)(− 5) − 2(4 ×4) = 25 − 2(16) = 25 − 32 =− 7