вычислите:
1)-27+14+(-80)+21+(-28)
2)-3,27+(4,84)+6,51+(-2,64)+7,65
3)11/48+13/72+(-17/48)+(-7/72)
1)-27+14+(-80)+21+(-28)
2)-3,27+(4,84)+6,51+(-2,64)+7,65
3)11/48+13/72+(-17/48)+(-7/72)
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Verified answer
-27+14+(-80)+21+(-28)= - 100
-27+14 = -(27 - 14) = -13
-13+(-80)= -(13 + 80) = -93
-93+21= -(93 - 21) = -72
-72+(-28)= -(72 + 28)=-100
– 3,27 + ( – 4,84) + 6,51 + ( – 2,64) + 7,65 = 3,41
если в примере число 4,84 с минусом тогда решение такое:
-3,27+(-4,84)= -(3,27 + 4,84) = -8,11
-8,11+6,51= -(8,11 - 6,51) = -1,6
-1,6 + (-2,64) = -(1,6 + 2,64) = -4,24
-4,24 + 7,65 = 7,65 - 4,24 = 3,4111/48+13/72+(-17/48)+(-7/72)= - 1/24
1) 11/48 + 13/72 = (11 * 3 + 13 * 2)/144 = 33/144 + 26/144 = 59/144
2)59/144 + (- 17/48) = 59/144 - 17/48 =(59 * 1 - 17 * 3)/144 = 59/144 - 51/144 = 8/144 = 1/18
3)1/18+(-7/72)=1/18 - 7/72 =(1 * 4 - 7 * 1)/72 = 4/72 - 7/72 = - 3/72 = - 1/24