Question

Найдите сумму: 1) -2+(-4) 2) -0,37+(-0,94) 3) -4,72+(-0,8) 4) -3 6/11+(-5 7/11) 5) -7/5+(-11/15) 6) -3 11/12+(-4 9/16)

Answer 1

1) $\displaystyle \tt -2+(-4)=-2-4=-6$

2) $\displaystyle \tt -0,37+(-0,94)=-0,37-0,94=-1,31$

3) $\displaystyle \tt -4,72+(-0,8)=-4,72-0,8=-5,52$

4) $\displaystyle \tt -3\frac{6}{11}+(-5\frac{7}{11})=-3\frac{6}{11}-5\frac{7}{11}=-\frac{39}{11}-\frac{62}{11}=-\frac{101}{11}=-9\frac{2}{11}$

5) $\displaystyle \tt -\frac{7}{5}+(-\frac{11}{15})=-\frac{7}{5}-\frac{11}{15}=-\frac{21}{15}-\frac{11}{15}=-\frac{32}{15}=-2\frac{2}{15}$

6) $\displaystyle \tt -3\frac{11}{12}+(-4\frac{9}{16})=-3\frac{11}{12}-4\frac{9}{16}=-\frac{47}{12}-\frac{73}{16}=-\frac{188}{48}-\frac{219}{48}=-\frac{407}{48}=-8\frac{23}{48}$