Question

y múltiplos de 10
a. completar la serie

1. 24, __veinticinco__, 26, 27
2. 12, ____________________, 32, 42
3. 29, ____________________, 31, 32
4. 21, ____________________, 25, 27, 29
5. 4, 14, ____________________, 34, 44
6. 101, ____________________, 99, 98
7. 5, 10, 15, ____________________, 25
8. 15, 30, 45, ____________________, 75
9. 90, ____________________, 50, 30, 10
10. 25, 30, 35, ____________________, 45

b. resolver la ecuación

1. 40 + 40 =
2. 9 + 17 =
3. 24 + 3 =
4. 3 + 18 =
5. 7 + 16 =
6. 25 + 4 =
7. 25 + 25 =
8. 19 + 9 =
9. 21 + 2 =
10. 45 + 45 =

Explanation:

Step1: Solve 40 + 40

Add the two numbers: 40 + 40 = 80

Step2: Solve 9 + 17

Add 9 and 17: 9 + 17 = 26

Step3: Solve 24 + 3

Add 24 and 3: 24 + 3 = 27

Step4: Solve 3 + 18

Add 3 and 18: 3 + 18 = 21

Step5: Solve 7 + 16

Add 7 and 16: 7 + 16 = 23

Step6: Solve 25 + 4

Add 25 and 4: 25 + 4 = 29

Step7: Solve 25 + 25

Add 25 and 25: 25 + 25 = 50

Step8: Solve 19 + 9

Add 19 and 9: 19 + 9 = 28

Step9: Solve 21 + 2

Add 21 and 2: 21 + 2 = 23

Step10: Solve 45 + 45

Add 45 and 45: 45 + 45 = 90

Answer:

1. 80
2. 26
3. 27
4. 21
5. 23
6. 29
7. 50
8. 28
9. 23
10. 90