7th Grade Math

Extra Practice EP11

Extra Practice

Multi-Part Lesson 4-1 (continued)

PARTS B C D PAGES 204–213

Solve each equation. Check your solution.

1. r - 3 = 14 2. t + 3 = 21 3. s + 10 = 23


2. 7 + a = - 10 5. 14 + m = 24 6. - 9 + n = 13


3. s - 2 = - 6 8. 6 + f = 71 9. x + 27 = 30


4. k - 9 = - 3 11. j + 12 = 11 12. - 42 + v = - 42


5. s + 1.3 = 18 14. x + 7.4 = 23.5 15. p + 3.1 = 18


6. w - 3.7 = 4.63 17. m - 4.8 = 7.4 18. x - 1.3 = 12


7. y + 3.4 = 18 20. 7.2 + g = 9.1 21. z - 12.1 = 14


8. v - 18 = 13 107 23. w - ^1
   10
   = 258 24. r + 6 107 = 1 _^15

Multi-Part Lesson 4-2: Multiplication and Division Equations

PARTS A B PAGES 214–219

Solve each equation. Check your solution.

1. 2 m = 18 2. - 42 = 6 n 3. 72 = 8 k


2. 
   
   
   
   • 20 r = 20 5. 420 = 5 s 6. 325 = 25 t
   
   
   
   


3. 
   
   
   
   • 14 = - 2 p 8. 18 q = 36 9. 40 = 10 a
   
   
   
   


4. 100 = 20 b 11. 416 = 4 c 12. 45 = 9 d


5. 0.5m = 3.5 14. 1.8 = 0.6x 15. 0.4y = 2


6. 1.86 = 6.2z 17. - 8 x = 24 18. 8.34 = 2 r


7. 1.67t = 10.02 20. 243 = 27 a 21. 0.9x = 4.5


8. _ 7 r = - 8 23. _w 7 = 8 24.

y

_ 12 = - 6

25. -c 4 = 10 26. 9 s = 8 27. _m 8 = 5

PARTS C D PAGES 220–226

Find the multiplicative inverse of each number.

1. 32 2. 45 3. 1 4. 10


2. 71 6. 169 7. 1 31 8. 3 ^34


3. 7 83 10. 6 52 11. 33 31 12. 66 ^23

Solve each equation. Check your solution.

13. 13 a = 2 14. 89 x = 24 15. 83 r = 36 16. 43 t = _^12


14. 16 = _h
    4
    18. m 8 = 12 19. ^58 n = 45 20. 10 = _b
    10


15. ^17 x = 7 22. 5 = ^15 y 23. 34 m = 28 24. ^23 z = 20


16. _c 9 = 81 26. m 9 = 9 27. 16 = ^49 f 28. _^158 x = 225

EP2_EP36_ExtPract_M1_895130.indd EP11 1/6/10 11:46 AM