Question

9/20+3/10+1/5; 11/25+13/50+14/75; 4/15+7/30+19/75.​

Answer 1

Ответ:

$\frac{9}{20} + \frac{3}{10} + \frac{1}{5}$

$\frac{9 + 6 + 4}{20}$

$\frac{19}{20}$

2)

$\frac{11}{25} + \frac{13}{50 } + \frac{14}{75}$

$\frac{66 + 39 + 28}{150}$

$\frac{133}{150}$

3)

$\frac{4}{15} + \frac{7}{30} + \frac{19}{75}$

$\frac{40 + 35 + 38}{150}$

$\frac{113}{150}$

Answer 2

Ответ:

1) 9/20=0.45

3/10=0.3

0.45+0.3=0.75

2) 1/5=0.5

0.75+0.5=1.25

1) 11/25=0.44

13/50=0.26

0.26+0.44=0.7

2) 14/75+0.7

14/75+ 0.7/75

=14.7/75=0.196

4/15+7/30=4*2=8, 15*2=30

получается 8/30+7/30=15/30

так оставим так как складывать еще будем. 15/30+19/75 , 15*2.5=37.5

30*2.5=75.

37.5/75+19.75=56.5/75

все

Answer 3

To solve these addition problems, we need to first find a common denominator for each set of fractions. Then we can add the numerators and simplify the result.

1. 9/20 + 3/10 + 1/5

To find the common denominator, we can multiply the denominators together: 20 × 10 × 5 = 1000

Now we can rewrite each fraction with a denominator of 1000: (9/20) × (50/50) = 450/1000 (3/10) × (100/100) = 300/1000 (1/5) × (200/200) = 200/1000

Adding these fractions together, we get:

450/1000 + 300/1000 + 200/1000 = 950/1000

Simplifying this fraction, we get:

950/1000 = 19/20

Therefore, 9/20 + 3/10 + 1/5 = 19/20.

2. 11/25 + 13/50 + 14/75

To find the common denominator, we can again multiply the denominators together: 25 × 50 × 75 = 93750

Now we can rewrite each fraction with a denominator of 93750: (11/25) × (3750/3750) = 41250/93750 (13/50) × (1875/1875) = 28125/93750 (14/75) × (1250/1250) = 18750/93750

Adding these fractions together, we get:

41250/93750 + 28125/93750 + 18750/93750 = 88125/93750

Simplifying this fraction, we get:

88125/93750 = 15/16

Therefore, 11/25 + 13/50 + 14/75 = 15/16.

3. 4/15 + 7/30 + 19/75

To find the common denominator, we can again multiply the denominators together: 15 × 30 × 75 = 33750

Now we can rewrite each fraction with a denominator of 33750: (4/15) × (2250/2250) = 9000/33750 (7/30) × (1125/1125) = 7875/33750 (19/75) × (450/450) = 8550/33750

Adding these fractions together, we get:

9000/33750 + 7875/33750 + 8550/33750 = 25425/33750

Simplifying this fraction, we get:

25425/33750 = 17/22

Therefore, 4/15 + 7/30 + 19/75 = 17/22.