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Arithmetic Ability: Level One: Mental Addition of two-digit numbers.

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61 + 15 =

93 + 55 =

44 + 81 =

90 + 58 =

74 + 63 =

26 + 40 =

44 + 42 =

70 + 89 =

90 + 63 =

66 + 94 =

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metodorf.com



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