Вычислить 4целых5/18-7/10

4[latex] \frac{5}{18} [/latex]-[latex] \frac{7}{10} [/latex] [latex] \frac{77}{18} - \frac{77}{10} [/latex] [latex] \frac{385-693}{90} [/latex] [latex] \frac{-308}{90} [/latex] [latex] \frac{-154}{45} [/latex]

4 5/18 - 7/10= 4 (5/18-7/10)=4 (50-126/180)= =4 -76/180 = 3 180/180 -76/180=3 104/280= = 3 26/70.