Question 1

$81 - 18 = \boxed{\phantom{0}}$ Hint: Write horizontal to vertical.

$\begin{array}{lr}
\mathrm{ } & 81\
\mathrm{-} &18\
\hline
\end{array}$

Accepted Answer

63

Answer

77

Answer

73

Answer

67

Question 2

$81 - 18 = \boxed{\phantom{0}}$

$\begin{array}{lr}
\mathrm{ } & 75\
\mathrm{-} &17\
\hline
\end{array}$

Accepted Answer

58

Answer

52

Answer

62

Answer

68

Question 3

$81 - 18 = \boxed{\phantom{0}}$

$\begin{array}{lr}
\mathrm{ } & 75\
\mathrm{-} &17\
\hline
\end{array}$

Accepted Answer

48

Answer

52

Answer

42

Answer

58

Question 4

$81 - 18 = \boxed{\phantom{0}}$

$\begin{array}{lr}
\mathrm{ } & 97\
\mathrm{-} &29\
\hline
\end{array}$

Accepted Answer

68

Answer

78

Answer

82

Answer

72

Question 5

$81 - 18 = \boxed{\phantom{0}}$

$\begin{array}{lr}
\mathrm{ } & 97\
\mathrm{-} &29\
\hline
\end{array}$

Accepted Answer

34

Answer

44

Answer

46

Answer

36

Question 6

$81 - 18 = \boxed{\phantom{0}}$

$\begin{array}{lr}
\mathrm{ } & 97\
\mathrm{-} &29\
\hline
\end{array}$

Accepted Answer

38

Answer

42

Answer

48

Answer

52

Question 7

$81 - 18 = \boxed{\phantom{0}}$

$\begin{array}{lr}
\mathrm{ } & 75\
\mathrm{-} &17\
\hline
\end{array}$

Accepted Answer

44

Answer

56

Answer

46

Answer

54

Question 8

$81 - 18 = \boxed{\phantom{0}}$

$\begin{array}{lr}
\mathrm{ } & 75\
\mathrm{-} &17\
\hline
\end{array}$

Accepted Answer

17

Answer

27

Answer

13

Answer

23

Question 9

$81 - 18 = \boxed{\phantom{0}}$

$\begin{array}{lr}
\mathrm{ } & 97\
\mathrm{-} &29\
\hline
\end{array}$

Accepted Answer

55

Answer

65

Answer

45

Answer

75

Question 10

$81 - 18 = \boxed{\phantom{0}}$

$\begin{array}{lr}
\mathrm{ } & 97\
\mathrm{-} &29\
\hline
\end{array}$

Accepted Answer

43

Answer

53

Answer

47

Answer

57

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