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

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54 + 30 =

11 + 43 =

59 + 77 =

87 + 72 =

77 + 63 =

82 + 46 =

98 + 74 =

87 + 46 =

32 + 79 =

34 + 83 =

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