11比一比，算一算




$\begin{array}{|c|}\hline80+ 20 = \\80- 20 = \\\hline\end{array}$
$\begin{array}{|c|}\hline41+ 5 = \\41+ 50 = \\\hline\end{array}$
$\begin{array}{|c|}\hline34+ 4 = \\34+ 7 = \\\hline\end{array}$
$\begin{array}{|c|}\hline82- 20 = \\82- 2 = \\\hline\end{array}$
$\begin{array}{|c|}\hline28- 7 = \\28- 9 = \\\hline\end{array}$
$\begin{array}{|c|}\hline60- 4 = \\60- 40 = \\\hline\end{array}$
$\begin{array}{|c|}\hline52- 3 = \\52- 30 = \\\hline\end{array}$
$\begin{array}{|c|c|c|c|}\hline\mathrm{被减数} & 50 & 42 & 57 & 62 \\\hline\mathrm{减数} & 30 & 5 & 8 & 9 \\\hline\mathrm{差} & & & & \\\hline\end{array}$
$\begin{array}{|c|c|c|c|}\hline\mathrm{加数} & 2 & 60 & 17 & 53 \\\hline\mathrm{加数} & 18 & 5 & 9 & 8 \\\hline\mathrm{和} & & & & \\\hline\end{array}$
$\begin{array}{|c|c|c|c|}\hline\mathrm{被减数} & & 34 & 51 & \\\hline\mathrm{减数} & 63 & 8 & & 4 \\\hline\mathrm{差} & 7 & & 6 & 33 \\\hline\end{array}$
$\begin{array}{|c|c|c|c|}\hline\mathrm{加数} & 43 & & 65 & \\\hline\mathrm{加数} & & 4 & 3 & 30 \\\hline\mathrm{和} & 63 & 81 & & 66 \\\hline\end{array}$

$\begin{array}{|c|}\hline80+ 20 = 100 \\80- 20 = 60 \\\hline\end{array}$
$\begin{array}{|c|}\hline41+ 5 = 46 \\41+ 50 = 91 \\\hline\end{array}$
$\begin{array}{|c|}\hline34+ 4 = 38 \\34+ 7 = 41 \\\hline\end{array}$
$\begin{array}{|c|}\hline82- 20 = 62 \\82- 2 = 80 \\\hline\end{array}$
$\begin{array}{|c|}\hline28- 7 = 21 \\28- 9 = 19 \\\hline\end{array}$
$\begin{array}{|c|}\hline60- 4 = 56 \\60- 40 = 20 \\\hline\end{array}$
$\begin{array}{|c|}\hline52- 3 = 49 \\52- 30 = 22 \\\hline\end{array}$
$\begin{array}{|c|c|c|c|}\hline\mathrm{被减数} & 50 & 42 & 57 & 62 \\\hline\mathrm{减数} & 30 & 5 & 8 & 9 \\\hline\mathrm{差} & 20 & 37 & 49 & 53 \\\hline\end{array}$
$\begin{array}{|c|c|c|c|}\hline\mathrm{加数} & 2 & 60 & 17 & 53 \\\hline\mathrm{加数} & 18 & 5 & 9 & 8 \\\hline\mathrm{和} & 20 & 65 & 26 & 61 \\\hline\end{array}$
$\begin{array}{|c|c|c|c|}\hline\mathrm{被减数} & 70 & 34 & 51 & 37 \\\hline\mathrm{减数} & 63 & 8 & 45 & 4 \\\hline\mathrm{差} & 7 & 26 & 6 & 33 \\\hline\end{array}$
$\begin{array}{|c|c|c|c|}\hline\mathrm{加数} & 43 & 77 & 65 & 36 \\\hline\mathrm{加数} & 20 & 4 & 3 & 30 \\\hline\mathrm{和} & 63 & 81 & 68 & 66 \\\hline\end{array}$