$47 + 28 =$ $60 + 90 =$ $62 - 48 =$
$42 - 17 =$ $81 - 18 =$ $17 + 32 =$
$60 + 37 =$ $36 + 42 =$ $63 - 54 =$
$35 - 22 =$ $93 - 56 =$ $39 + 27 =$
$80 + 50 =$ $28 + 34 =$ $82 - 15 =$
$56 - 29 =$ $37 - 18 =$ $21 + 36 =$
$56 + 23 =$ $37 + 33 =$ $54 - 39 =$
$70 - 35 =$ $50 - 28 =$ $33 + 45 =$
$29 + 38 =$ $27 + 53 =$ $75 - 37 =$
$61 - 52 =$ $40 - 18 =$ $20 + 59 =$

75 150 14
25 63 49
97 78 9
13 37 66
130 62 67
27 19 57
79 70 15
35 22 78
67 80 38
9 22 79

$400+\begin{matrix}600\\1000\\700\end{matrix}=\begin{matrix}\\\\ \end{matrix}$ $\begin{matrix}1400\\1000\\800\end{matrix}-500=\begin{matrix}\\\\ \end{matrix}$
$\begin{matrix}80\\300\\50\end{matrix}+60=\begin{matrix}\\\\ \end{matrix}$

1000 1400 1100
900 500 300
140 360 110