(3,9-2.55+ 4 5/12- 1 1/15):4.7(0,8*8 1/3-0.57:4 3/4):2.21+4/125:2 1/16 Помогите огромный...

Question

(3,9-2.55+ 4 5/12- 1 1/15):4.7
(0,8*8 1/3-0.57:4 3/4):2.21+4/125:2 1/16 Помогите огромный пример решить) Всё забыл(

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Comments

1) 3,9-2,55=1,5 2) 1 35/100+4 5/12 = 1 420/1200+4 500/1200=5 920/1200 3) 5 920/1200-1 1/15= 5 920/1200-1 80/1200=4 840/1200 4) 4 840/1200: 4 7/10= 5640/1200*10/47= 1 5) 81/100*8 1/3=81/100*25/3=27/4

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6) 57/100:4 3/4=57/100*4/19=3/25 7) 27/4-3/25=675/100-12/100=663/100=6,63 8) 6,63-2,21=3 9) 4 125/100: 2 1/16=525/100*16/33=8400/3300

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10) 3/1+8400/300=9900/3300+8400/3300=18300/3300 11) 1/1:18300/3300=1/1*3300/18300=0,18 при округлении 0,2

Answer 1

1) a)3,9-2,55=1,35
b) 4 5/12 -1 1/15= 53/12-16/15=265-64/60=201/60=3.35
c)1.35+3.35=4.7
d)4.7/4.7=1
2) a)0.81*8 1/3=81/100*25/3=27/4=6.75
b)0.57 : 4 4/3=57/100 : 19/4=57/100*4/19=12/100=0.12
c)6.75-0.12=6.63
d)6.63/2.21=3
e)4.125 : 2 1/16=4 125/1000 : 33/16= 4125/1000 * 16/33=2000/1000=2
f) 3+2=5