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Suma y resta: inversas y expresiones

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Expresiones aditivas hasta 999

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Mexico

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Suma y resta: inversas y expresiones
 

Suma y resta: inversas y expresionesOnline version

Expresiones aditivas hasta 999

by jimena paulin ortiz
1

Cualquier cantidad menor a 1000 solo se puede expresar con sumandos mayores a 500.

2

Si 13 - 8 = 5, entonces 5 + 8 = 13.

3

Solo se pueden usar dos números para expresar una cantidad con sumas.

4

La suma y la resta son operaciones inversas entre sí.

5

La suma no tiene relación con la resta.

6

Si 7 - 2 = 5, entonces 7 + 2 = 5.

7

Para una resta 50 - 20, el resultado 30 es la diferencia entre los dos números.

8

Se pueden representar cantidades menores a 1000 usando solo sumas y restas.

9

Se pueden usar expresiones aditivas como 100 + 37 + 60 para representar 197.

10

La resta siempre da resultados positivos.

11

Si 17 + 13 = 30, entonces 30 - 13 = 17.

12

28 + 50 = 100.

13

25 + 25 = 60.

14

Si tengo 24 dulces y me regalan 15 más, entonces tengo 39 dulces.

15

48 - 20 = 38.

16

Si 50 - 20 = 30, entonces 30 + 20 = 50.

17

Si ya sé sumar, puedo usar la resta para comprobar mi resultado.

18

40 - 18 = 30.

19

Sumar es juntar cantidades y restar es quitar cantidades.

20

35 + 12 = 46.

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