Решите примеры. 4 3/7+3 2/7+(1-5: 7); (100-10): - вопрос №4373271571001041241221128682751 от marisina 01.09.2020 12:34

Question

Математика: Решите примеры. 4 3/7+3 2/7+(1-5: 7); (100-10): (4 1/2+4 1/2); 2: 1+1: 2+8 1/2

marisina · Answer

4 3/7+ 3 2/7+(1-5/7)=31/7+21/7+((7-5)/7)=(31+21)/7+2/7=52/7+2/7=54/7=7 5/7(100-10):(4 1/2+4 1/2)=90:(9/2+9/2)=90:18/2=(90×2)/18=180/18=10 2/1+1/2+8 1/2=(4+1+16)/2...