Simplify:
33. (+9) x (+13) = ____________.
34. (-12) x (-35) = ____________.
35. (-16) x (245) = ____________.
36. (+21) x (-40) = ____________.
37. (+36) x (-15) = ____________.
38. (-10) x (+23) = ____________.
39. (-48) x (+60) = ____________.
40. (-72) x (200) x (-1) x (-2) = ____________
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Answer:
33. (+9) x (+13) = 117
34. (-12) x (-35) = 420
35. (-16) x (245) = -3920
36. (+21) x (-40) = -840
37. (+36) x (-15) = -540
38. (-10) x (+23) = -230
39. (-48) x (+60) =-2880
40. (-72) x (200) x (-1) x (-2) = -28,800.
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