57.6: 4+1 1/6: 4 2/3-(2.7+5 1/20) ×0.8 2 1/15-(1 - вопрос №5977910576411642327512008211512315 от Лера240504 30.10.2020 02:12

Question

Математика: 57.6: 4+1 1/6: 4 2/3-(2.7+5 1/20) ×0.8 2 1/15-(1 2/3+1/5)

Лера240504 · Answer

57.6:4+1 1/6:4 2/3-(2.7+5 1/20) ×0.8=8,45
1)2 7/10+5 1/20=7 14/20+1/20=7 3/4
2)57,6:4=14,4
3)7/6:14/3=7/6*3/14=1/4
4)7 3/4*0,8=6,2
5)14,4+0,25=14,65
6)14,65-6,2=8,45
2 1/15-(1 2/3+1/5)= 31/15-(5/3+1/5)=31/15-(25/15+3/15)= 31/15-28/15=3/15=1/5