Subtract: |
(a) \[35(20);\] |
(b) \[72(90);\] |
(c) \[(15);(18);\] |
(d) \[\text{(}\,20)(13);\] |
(e) \[23-(12);\] |
(f) \[(32)-(40)\] |
Answer:
(a) 35 - (20) = 35 + (additive inverse of 20) = 35 + (- 20) = 15 (b) 72 - (90) = 72 + (additive inverse of 90) = 72 + (- 90) = - 18 (c) (- 15) - (- 18) (a) = (- 15) + (additive inverse of - 18) (b) = (- 15) + (+ 18) (c) = 3 (d) (- 20) - (13) = (- 20) + (additive inverse of 13) = (- 20) + (- 13) = - 33 (e) 23 - (- 12) = + 23 + (additive inverse of - 12) = 23 + 12 = 35 (f) (- 32) - (- 40) = (- 32) + (additive inverse of - 40) = (- 32 + 40) = 8
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