Question

(1--23): 227 49 147 d) | 14: (1/2 + 1 - 1) 3 (3-1/13 - 12/2): 21/7/ ( 12/₁1 + 1/3 - 2/7).21 | 0​ можно с фотой

Answer 1

c)

$(1 \frac{1}{7} - \frac{23}{49} ) \div \frac{22}{147} = ( \frac{8}{7} - \frac{23}{49} ) \times \frac{147}{22} = \frac{33}{49} \times \frac{147}{22} = 3 \times \frac{3}{2} = \frac{9}{2} = 4 \frac{1}{2}$

d)

$14 \div ( \frac{1}{2} + \frac{1}{3} - \frac{1}{4} ) = 14 \div \frac{7}{12} = 14 \times \frac{12}{7} = 2 \times 12 = 24$

h)

$(3 \frac{1}{3} - 1 \frac{5}{6} ) \div 2 \frac{1}{7} = (\frac{10}{3} - \frac{11}{6} ) \div \frac{15}{7} = \frac{3}{2} \times \frac{7}{15} = \frac{1}{2} \times \frac{7}{5} = \frac{7}{10}$

i)

$( \frac{8}{21} + \frac{1}{3} - \frac{5}{7}) \times 21 = 0 \times 21 = 0$

Answer 2

Ответ:

c) (1 1/7 - 23/49): 22/147 = ( 56/49 - 23/49): 22/147 = 33/49: 22/147 = 33/49 × 147/22 = 3/1 × 3/2 = 9/2 = 4 1/2

d) 14: (1/2 + 1/3 - 1/4) = 14: (6/12 + 4/12 - 3/12)= 14: 7/12 = 14/1 × 12/7 = 2/1 × 12/1 = 24

h) (3 1/3 - 1 5/6): 2 1/7 = (20/6 - 11/6): 2 1/7 = 9/6: 15/7 = 9/6 × 7/15 = 3/6 × 7/5 = 21/30 = 7/10

i) (8/21 + 1/3 - 5/7) × 21 = (8/21 + 7/21 - 15/21) × 21 = 0 × 21 = 0

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