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Desafío: sumas y restas 2 dígitos

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Played 3 %Accuracy 35 Average time 00:51

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Suma y resta de dos dígitos

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Desafío: sumas y restas 2 dígitos
 

Desafío: sumas y restas 2 dígitosOnline version

Suma y resta de dos dígitos

by Emilia Arbe Paz
1

¿Cuánto es 37 + 28?

2

¿Cuánto es 46 - 19?

3

¿Cuánto es 58 + 33?

4

¿Cuánto es 72 - 46?

5

¿Cuánto es 19 + 27?

6

¿Cuánto es 84 - 29?

7

¿Cuánto es 23 + 46?

8

¿Cuánto es 90 - 37?

9

¿Cuánto es 61 + 14?

10

¿Cuánto es 75 - 28?

Explicación

La suma correcta es 65; 65 es la suma de las unidades 7+8 y las decenas 3+2.

43? No. 46-19=27; sustrae 19 de 46 paso a paso.

58+33 suma 50+30 y 8+3 = 91.

72-46=26; presta de las decenas para restar 6 de 7.

1+2=3 en decenas; 9+7=16 entre unidades se lleva.

84-29=55; restas 29 de 84 correctamente.

2+4=6 decenas; 3+6=69.

90-37=53; restas sin problemas en las decenas.

61+14=75; 1+1 en decenas y 5 en unidades.

75-28=47; toma 28 de 75 prestando en las decenas.

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