(8 2/5: 5 1/4 + 1 17/46*3 2/7): 3 1/20-1 4/5 - вопрос №5045480825514117463273120145 от shahboz3 23.12.2020 07:42

Question

Математика: (8 2/5: 5 1/4 + 1 17/46*3 2/7): 3 1/20-1 4/5

shahboz3 · Answer

(8 2/5÷5 1/4+1 17/46×3 2/7)÷3 1/20-1 4/5=1/5

1)8 2/5÷5 1/4=42/5÷21/4=42/5×4/21=2/5×4/1=8/5=1 3/5
2)1 17/46×3 2/7=63/46×23/7=9/2×1/1=9/2=4 1/2
3)1 3/5+4 1/2=1 6/10+4 5/10=5 11/10=6 1/10
4)6 1/10÷3 1/20=61/10÷61/20=61/10×20/61=1/1×2/1=2/1=2
5)2-1 4/5=1 5/5-1 4/5=1/5