Предмет: Математика, автор: НатальяСамкова

2 целых 1/3 умножить на 3 целых 1/5 минус 8 целых 4/9 разделить на 2

напишите, пожалуйста, по дейсвиям.

Ответы

Автор ответа: nafanya2014
0
1)2 frac{1}{3}cdot 3 frac{1}{5} = frac{7}{3}cdot frac{16}{5}= frac{7cdot16}{3cdot 5}= frac{112}{15} =7 frac{7}{15} \    
2) 8 frac{4}{9}:2=   frac{76}{9}  cdot frac{1}{2}= frac{38}{9}  =4 frac{2}{9}   \ 3)7 frac{7}{15} -4 frac{2}{9}=3 frac{7cdot 3-2cdot 5}{45}=7 frac{11}{45}
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