А) 5 5/9 + 3 1/6 -6 4/27 б) 12 13/48- (9 17/32-4 5/24 - вопрос №6147642559316642712134891732452415731114 от race201 20.05.2020 21:24

Question

Математика: А) 5 5/9 + 3 1/6 -6 4/27 б) 12 13/48- (9 17/32-4 5/24 в) 1 5/7 + 3 11/14 - 2 1/4 г) ( 18 -10 18/35) - ( 3 9/28 +2 3/20

race201 · Answer

5 5/9(*6)+3 1/6(*9)- 6 4/27(*2)=5 30/54+3 9/54-6 8/54=2 31/54

12 13/48-(9 17/32-4 5/24)=7 91/96
1)9 17/32(*3)-4 5/24(*4)=9 51/96- 4 20/96=5 31/96
2)12 13/48(*2)-5 31/96=12 26/96-5 31/96=11 218/96-5 31/96=6 187/96=
=7 91/96

1 5/7(*4)+3 11/14(*2)-2 1/4(*7)=1 20/28+3 22/28-2 7/28=2 37/28

(18-10 18/35)-(3 9/28+2 3/20)=3 3/70
1)18-10 18/35=8 18/35
2)3 9/28(*5)+2 3/20(*7)=3 45/140+2 21/140=5 66/140
3)8 18/35(*4)-5 66/140=8 72/140-5 66/140=3 6/140=3 3/70