Сдробями. 1) 5/8 - 2/5 + 3/20 2) 1/8 + ( 5/9 -1/4 - вопрос №412613215825320218591435631025 от kiraalexeyeva 15.01.2022 19:49

Question

Математика: Сдробями. 1) 5/8 - 2/5 + 3/20 2) 1/8 + ( 5/9 -1/4 ) 3) 5/6 - ( 3/10 + 2/5 ) 4) 3/4 + 1/8 - 5/16

kiraalexeyeva · Answer

1) 5/8 - 2/5 + 3/20=25-15-6/40=15/40=3/8
2) 1/8 + ( 5/9 -1/4 )=
1)5/9-1/4=20-9/36=11/36
2)11/36+1/8=22+9/72=31/72
3) 5/6 - ( 3/10 + 2/5 )=
1)3/10+2/5=7/10
2)5/6-7/10=25-21/30=4/30=2/15

4) 3/4 + 1/8 - 5/16=12+2-5/16=9/16