5+4y
1) 5+4*3 = 5+12 = 17
2) 5+4*(-7) = 5+(-28) = -23
3) 5+4*0,25 = 5+1 = 6
4) ![5+4*(-\frac{4}{3}) = 5+\frac{4}{1} * \frac{4}{3} = \frac{16}{3} = (-5\frac{1}{3}) = 5-5\frac{1}{3} = -\frac{1}{3}](https://tex.z-dn.net/?f=5%2B4%2A%28-%5Cfrac%7B4%7D%7B3%7D%29+%3D+5%2B%5Cfrac%7B4%7D%7B1%7D+%2A+%5Cfrac%7B4%7D%7B3%7D+%3D+%5Cfrac%7B16%7D%7B3%7D+%3D+%28-5%5Cfrac%7B1%7D%7B3%7D%29+%3D+5-5%5Cfrac%7B1%7D%7B3%7D+%3D+-%5Cfrac%7B1%7D%7B3%7D)
5) 5+4*
= 5+
= 5+(-
) = ![5 + (-\frac{2}{21}) = 4\frac{21}{21} + (-\frac{2}{21}) = 4\frac{19}{21}](https://tex.z-dn.net/?f=5+%2B+%28-%5Cfrac%7B2%7D%7B21%7D%29+%3D+4%5Cfrac%7B21%7D%7B21%7D+%2B+%28-%5Cfrac%7B2%7D%7B21%7D%29+%3D+4%5Cfrac%7B19%7D%7B21%7D)
В пустых клетках писать ответ
0.52(десятичная дробь)=52/100(обыкновенная дробь)=13/25(сократили)
Ответ:
Пошаговое объяснение:
а) 1 1/2 + (3 4/7 + 1 2/3)=1 1/2 +(3 12/21 +1 14/21)=1 1/2 +5 5/21=1 21/42 +5 10/42=6 31/42
б) (1 -3/11)+ 3/22=(11-3)/11 +3/22=16/22 +3/22=19/22
в) 5 3/4+ (5 - 2 3/5)=5 3/4 +(4 5/5 -2 3/5)=5 3/4 +2 2/5
В этом случае есть 2 способа решения:
1) 5 3/4 +2 2/5=5,75+2,4=8,15
2) 5 3/4 +2 2/5=5 15/20 +2 8/20=8 3/20=8,15