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Interactive Portal-Book of Self-Development Methods

Arithmetic ability: Level One: Mental subtraction of two-digit numbers.

Return to exercise selection

67 - 15 =

71 - 12 =

84 - 15 =

39 - 16 =

57 - 25 =

42 - 31 =

74 - 16 =

75 - 49 =

93 - 77 =

59 - 37 =

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© Oleg Akvan
metodorf.com



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