A)4,5*5 5/9+6,4*3/8=
B)(5/6+1/3):(2 2/3-1,75)=
C)1 1/2:[(1 1/4:1 2/3:):1 1/5]=
D)17/40-0,2
____________=
1 3/5
E) (3 3/5-2)*5
__________=
0,004
F) 4 3/8
___________=
(1 5/8-0,75)
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4,5*5 5/9+6,4*3/8=
4½ × 5⁵/₉ + 6 ⅖ ×⅜ =
⁹/₂ × ⁵⁰/₉ + ³²/₅ × ⅜ =
25 +¹²/₅ =
27 ⅖
(5/6+1/3):(2 2/3-1,75)=
(⅚ + ²/₆) ÷ (2⅔ - 1¾)=-
⁷/₆ ÷ ( 2⁸/₁₂ - 1⁹/₁₂) =
⁷/₆ ÷ (1²⁰/₁₂- 1⁹/₁₂) =
⁷/₆ ÷ ¹¹/₁₂ =
⁷/₆ × ¹²/₁₁=
¹⁴/₁₁=
1³/₁₁
1 1/2:[(1 1/4:1 2/3:):1 1/5]=
1½ ÷[(1¼ ÷ 1⅔) ÷ 1⅕] =
1½ ÷[ ( ⁵/₄ ÷ ⁵/₃)÷⁶/₅]=
³/₂ ÷[(⁵/₄ ׳/₅)×⁵/₆]=
²/₃×[¾ × ⁵/₆]=
⅔ × ⁵/₈ =
⁵/₁₂
D)17/40-0,2
____________=
1 3/5
¹⁷/₄₀ - ²/₁₀
___________ =
1⅗
¹⁷/₄₀ -⁸/₄₀
------------- =
⁸/₅
⁹/₄₀
------ =
⁸/₅
⁹/₄₀ × ⅝ =
⁹/₆₄
E) (3 3/5-2)*5
__________=
0,004
(3⅗ - 2) × 5
--------------- =
¹/₂₅₀
1⅗ × 5
---------- =
¹/₂₅₀
⁸/₅ × 5
-------- =
¹/₂₅₀
8÷ ¹/₂₅₀ =
8×250= 2000
F) 4 3/8
___________=
(1 5/8-0,75)
4⅜
-------- =
(1⅝ - ¾)
4⅜
--------------- =
(¹³/₈ - ⁶/₈)
³⁵/₈
----------- =
⁷/₈
³⁵/₈ × ⁸/₇ =
³⁵/₇ =
5