a) 1:5
____________________=
(83 5/18-85 7/20):2 2/3
b) (3 1/12 + 4,375):19 8/9
______________________ =
2 5/8 - 2/3 * 2 5/14
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a) 1:5
____________________=
(83 5/18-85 7/20):2 2/3
1/5
= ----------------------------------- =
[( 1499/18) - (1707/20)]: (8/3)
1/5
= ------------------------------------- =
[14990/180 - 15363/180)*(3/8)
1/5 1/5
= ---------------- ----= ----------------- =(1/5) : (-373/480) =(1/5)*(-480/373)=
(-373/180)*(3/8) (-373/480)
= 96/373
b) (3 1/12 + 4,375):19 8/9
______________________ =
2 5/8 - 2/3 * 2 5/14
(37/12 + 35/8) : 179/9
= -------------------------------- =
21/8 - 2/3*33/14
(74/24 + 105/24)*(9/179)
= --------------------------------- =
21/8 - 11/7
( 179/24)*(9/179)
= ---------------------------- =
147/56 - 88/56
(3/8)
= --------------- = (3/8) : (59/56) = (3/8)*(56/59) = 21/59
59/56