Question: EXERCISE 2.3 MENTAL MATH Perform the indicated operations mentally. 9 3 2. 8 1. 13 13 7x 5x 3a 4. 12 12 3. 6 6

EXERCISE 2.3 MENTAL MATH Perform the indicated operations mentally. 9 3 2. 8 1. 13 13 7x 5x 3a 4. 12 12 3. 6 6 3 5 5. 4x 4x Written math A. Perform the indicated operations. 11. 24 21 11 1 5 7 7 2 14 12. 2 6 9 3 13. 3 5 11 5 3 6 x 2x 3x 14. 47 5y 15. atb a-b 4 3EXERCISE 2.2 B. Solve the following 21. The area of a MENTAL MATH its length if i Solve each mentally. 22. The dimens x3 3 2. 2x 1. 2x+ 4y 9 7 , a Ar 9 6x -3y 3 16m 4. 3 16 9 23. An airplane 1lab 10c 5. Find the ti 20 33ab 24. The stress If the f 2x-7 x - 32 Written math steel mat A. Perform the indicated operations and simplify. 25. The effi 2a +6 106' 7d' - 14d 11. 12/ machin 56 34 +9 12. 21d b -28dh machin 13. 2x -3 5x-1 3x -2* +5 3ab + 1-5x 2x + 3 14. 2x -5 6x -9x Math Chall 15. x-yx+x x+y Do as direc 26. If x 27. Eval Hir

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