Basic Math & Pre-Algebra All-in-One For Dummies (+ Chapter Quizzes Online). Mark Zegarelli
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(f)
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(a) 18. Switch around the numbers (with their signs) to turn the problem into subtraction:
(b) −9. Drop the plus sign to turn the problem into subtraction:
(c) −79. Drop the signs, add the numbers, and negate the result:
(d) 7. Turn the problem into subtraction:
(e) −28. Turn the problem into subtraction:
(f) −537. Drop the signs, add the numbers, and negate the result:
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(a)
(b)
(c)
(d)
(e)
(f)
8
(a) 43. Cancel the adjacent negative signs to turn the problem into addition:
(b) −66. Drop the signs, add the numbers, and negate the result:
(c) 46. Cancel the adjacent negative signs to turn the problem into addition:
Now switch around the numbers (with their signs) to turn the problem back into subtraction:
(d) −158. Drop the signs, add the numbers, and negate the result:
(e) 124. Cancel the adjacent negative signs to turn the problem into addition:
(f) −71. Cancel the adjacent negative signs to turn the problem into addition:
Now switch around the numbers (with their signs) to turn the problem back into subtraction:
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(a)
(b)
(c)
(d)
10
(a)
(b)
(c)
(d)
11
The numbers
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The numbers