Предварительно сократив дроби, выполните сложение 1)10/24+21/54 2) 28/40+10/75 3)...

Question

Предварительно сократив дроби, выполните сложение

1)10/24+21/54 2) 28/40+10/75 3) 14/24+15/40 4) 4/24+3/36

Answer 1

=5/12+7/18=5+7/36=15+14/36=39/36=13/12

Comments

15+14 = 29

---

Решаем по шагам
1. (5//12)+21/54
1.1. 10/24=(5//12)
2. (5//12)+(7//18)
2.1. 21/54=(7//18)
3. 29//36
3.1. (5//12)+(7//18)=(29//36)

---

Решаем по шагам:
1. 0.7+10/75
1.1. 28/40=0.7
28.0|4_0_ _
2_8_0_|0.7
0
2. 0.7+(2//15)
2.1. 10/75=(2//15)
3. 5//6
3.1. 0.7+(2//15)=(5//6)

---

Решаем по шагам:
1. (7//12)+15/40
1.1. 14/24=(7//12)
2. (7//12)+0.375
2.1. 15/40=0.375
15.0|4_0_ _
1_2_0_|0.375
300
2_8_0_
200
2_0_0_
0
3. 23//24
3.1. (7//12)+0.375=(23//24)

---

Решаем по шагам:
1. (1//6)+3/36
1.1. 4/24=(1//6)
2. (1//6)+(1//12)
2.1. 3/36=(1//12)
3. 0.25
3.1. (1//6)+(1//12)=0.25

---

вот нормальный ответ

---

большой но зато правильный

Answer 2

1)10/24+21/54 
10/24 = 5/12  
21/54 = 7/18
5/12 + 7/18 = 15/36 + 14/36 = 29/36

2) 28/40+10/75
28/40 = 14/20 = 7/10
10/75 = 2/15
7/10 + 2/15 = 21/30 + 4/30 = 25/30 = 5/6

3) 14/24+15/40
14/24 = 7/12
15/40 = 3/8
7/12 + 3/8 = 28/48 + 18/48 = 46/48 = 23/24 

4) 4/24+3/36
4/24 = 2/12 = 1/6
3/36 = 1/12
1/6 + 1/12 = 2/12 + 1/12 = 3/12 = 1/4

Comments

Верно?

---

Да