(1) Calcula y comprueba con los números de la solución.

(a)	(b)	(c)	(d)
27 + 12 = 39	22 + 30 =	44 + 15 =	27 + 20 =
12 + 29 =	39 + 19 =	25 + 40 =	25 + 23 =
25 + 16 =	20 + 39 =	37 + 26 =	35 + 26 =
35 + 20 =	26 + 23 =	20 + 48 =	15 + 13 =
15 + 30 =	39 + 26 =	72 + 13 =	22 + 29 =
Resultados: 41   59   59   65   45   52   58   65   51 41   45   65   63   55   39  49   85   68   85

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(2) ¿Qué símbolo se necesita? ¿<, > o =?

(a)	(b)	(c)	(d)
14 + 15 57	51 18 + 21	13 + 11 17 + 16	14 + 18 21 + 15
20 + 18 35	34 21 + 30	14 + 11 26 + 13	18 + 21 30 + 20

(3) Introduce los números que faltan.

+ 16 24 35 12 35 56

+ 17 24 32 26 50 54

+ 16 29 31 11 37 58

(4) Introduce los números que faltan.

(a)	(b)	(c)
12 + 20 + 13 = _______	39 + 25 + 11 = _______	29 + 36 + 23 = _______
20 + 11 + 28 = _______	10 + 31 + 15 = _______	31 + 23 + 33 = _______
20 + 15 + 10 = _______	46 + 13 + 9 = _______	10 + 54 + 19 = _______
8 + 17 + 28 = _______	40 + 15 + 25 = _______	20 + 28 + 35 = _______
23 + 13 + 8 = _______	21 + 28 + 28 = _______	36 + 18 + 30 = _______

(5) Suma los siguientes valores hasta la última fila:

[1]

[4]

[7]

[10]

[13]

[16]

[19]

[22]

[25]

↘ + ↙

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[   ]

[11]

[   ]

[   ]

[   ]

[   ]

[   ]

[   ]

↘ + ↙

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↘ + ↙

↘ + ↙

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↘ + ↙

↘ + ↙

[   ]

[   ]

[   ]

[52]

[   ]

[   ]

[   ]

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[   ]

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[   ]

[   ]

[   ]

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[   ]

[   ]

[   ]

[   ]

[   ]