, . , — , .
.
. — . . , .
, 1 , 1 2 . 2.20. 2, 2.20 — ( ) , . .
= + 2 (35 — 40) — , . , 1.5, -1.5 + 80 = 2.30 .
= 2 + 5, 5 ( 0.7-1). , 1.80, — 3.65. , . , , .
. , . 50 70, , 50. : 70 + 70 + 30( )+ 5-7 = 1.77 — (2.20), — 50 + 5 ( ) 2 = 1.10 . , 50 70 1.10 , (2.20 — 1.77( 80) = 40.
, 30, 5 . : 50 + 50 +5 2 =2.10 ( ), 70 +5 ( ).
. : 2.30 () + 3.65 () + 1.10 ( ) 75 ( ) = 7.05 6.7. . 1.50.
1.50 — . — 1.50 — + (2.20 2 = 4.40 + 2 = 4.42). — (2.10 -2.20) + .
0.80 . . (2.20 2 = 4.40) . — 8.40 + 5 = 8.45, 1.50, 1.60, , 2-3. 2 + 20-25.