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Sumas de dos cifras

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Sumas de dos cifras

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About this activity

Practica sumas de dos cifras

Created by

Alberto Iracheta
Alberto Iracheta
Mexico

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Sumas de dos cifras
 

Sumas de dos cifrasOnline version

Practica sumas de dos cifras

by Alberto Iracheta
1

¿Cuánto es 34 + 27?

2

¿Cuánto es 48 + 15?

3

¿Cuánto es 56 + 29?

4

¿Cuánto es 27 + 46?

5

¿Cuánto es 19 + 28?

6

¿Cuánto es 63 + 14?

7

¿Cuánto es 52 + 23?

8

¿Cuánto es 41 + 36?

9

¿Cuánto es 29 + 57?

10

¿Cuánto es 46 + 28?

Explicación

La suma correcta es 61; añade 30+30 y 4+1 para comprobar.

46+15 = 63; al sumar, el 40 y 8 hacen 48, y 15 completa 63.

56+30 sería 86; restar 1 da 85.

27+40 = 67; 27+6 = 33; total 73.

20+28 = 48; restar 1 da 47.

60+14 = 74; añade 3 para llegar a 77.

50+23=73; añade 2 para 75.

40+36=76; con 1 adicional llega a 77.

29+50=79; +7 = 86.

40+28=68; +6 = 74.

 
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