Вычислите: 1) 2,9+(-7.4)
2)-4,1+1,8
3)-2 1/3+(-1 7/9)
4)-1 5/6+(-3 5/12)
5)-2 1/6+(-0,9)+3 1/15
6)-1 2/15+3 5/6+(-1,7)
Вычислите: 1) 2,9+(-7.4)
2)-4,1+1,8
3)-2 1/3+(-1 7/9)
4)-1 5/6+(-3 5/12)
5)-2 1/6+(-0,9)+3 1/15
6)-1 2/15+3 5/6+(-1,7)
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Verified answer
1) 2,9+(-7.4)=2,9-7,4=-4,5
2)-4,1+1,8 = -2,3
3)-2 1/3+(-1 7/9)= -7/3 - 16/9= -21/9 - 16/9= -37/9=- 4 1/9
4)-1 5/6+(-3 5/12)= -11/6 - 41/12= -22/12 - 41/12 = -63/12= - 5 3/12 = - 5 1/4
5)-2 1/6+(-0,9)+3 1/15 = -13/6 - 9/10 + 46/15 = -65/30 - 27/30 + 92/30=92/30-92/30=0
6)-1 2/15+3 5/6+(-1,7) = - 17/15 + 23/6 - 17/10 = -34/30 + 115/30 - 51/30= 30/30= 1