А)(-37+(-25))+(-49)=(-37-25)-49=-62-49=-111
б)(-2 4/15+(-1 1/3))+(-1,4)=( - 34/15- 20/15) - 21/15= -54/14-21/15=-75/15=-5
в)(-56+37)+(-29)=-19-29=-48
г)(1,3+(-1,9))+16/35=(1,3-1,9)+16/35=-0,6+16/35=-21/35+16/35=-5/35=-1/7
16 : 2 = 8 пирожных в каждой коробке
8 : 2 = 4 человека в семьей
0.42 : 0.06 = 42 : 6 = 7
0.036 : 0.09 = 3.6 : 9 = 0.4
1.23 : 0.41 = 123 : 41 = 3
0.056 : 0.08 = 5.6 : 8 = 0.7
0.975 : 1.95 = 97.5 : 195 = 0.5
5.85 : 3.25 = 585 : 325 = 1.8
1)
(3/4 + 1/5) * 5/19 = 19/20* 5/19 = 5/20 = 1/4
2)
(12 1/3 - 7 3/4) * 6/11 = 4 7/12 * 6/11 = 2 1/2
3)
(2 3/5 - 5/8) : 19 3/4 = 1 39/40 : 19 3/4 = 1/10