4列竖式计算
$\begin{array}{l}34+ 25 = \\\begin{array}{r}(\quad\quad\quad) \\+ (\quad\quad\quad) \\\hline(\quad\quad\quad)\end{array}\end{array}$
$\begin{array}{l}48+ 29 = \\\begin{array}{r}(\quad\quad\quad) \\+ (\quad\quad\quad) \\\hline(\quad\quad\quad)\end{array}\end{array}$
$\begin{array}{l}16+ 77 = \\\begin{array}{r}(\quad\quad\quad) \\+ (\quad\quad\quad) \\\hline(\quad\quad\quad)\end{array}\end{array}$
$\begin{array}{l}36+ 20 = \\\begin{array}{r}(\quad\quad\quad) \\+ (\quad\quad\quad) \\\hline(\quad\quad\quad)\end{array}\end{array}$
$\begin{array}{l}21+ 49 = \\\begin{array}{r}(\quad\quad\quad) \\+ (\quad\quad\quad) \\\hline(\quad\quad\quad)\end{array}\end{array}$
$\begin{array}{l}49+ 45 = \\\begin{array}{r}(\quad\quad\quad) \\+ (\quad\quad\quad) \\\hline(\quad\quad\quad)\end{array}\end{array}$
$\begin{array}{l}33+ 48 = \\\begin{array}{r}(\quad\quad\quad) \\+ (\quad\quad\quad) \\\hline(\quad\quad\quad)\end{array}\end{array}$
$\begin{array}{l}73+ 16 = \\\begin{array}{r}(\quad\quad\quad) \\+ (\quad\quad\quad) \\\hline(\quad\quad\quad)\end{array}\end{array}$

$\begin{array}{l}34+ 25 = 59\\\begin{array}{r}34 \\+ 25 \\\hline59\end{array}\end{array}$
$\begin{array}{l}48+ 29 = 77\\\begin{array}{r}48 \\+ 29 \\\hline77\end{array}\end{array}$
$\begin{array}{l}16+ 77 = 93\\\begin{array}{r}16 \\+ 77 \\\hline93\end{array}\end{array}$
$\begin{array}{l}36+ 20 = 56\\\begin{array}{r}36 \\+ 20 \\\hline56\end{array}\end{array}$
$\begin{array}{l}21+ 49 = 70\\\begin{array}{r}21 \\+ 49 \\\hline70\end{array}\end{array}$
$\begin{array}{l}49+ 45 = 94\\\begin{array}{r}49 \\+ 45 \\\hline94\end{array}\end{array}$
$\begin{array}{l}33+ 48 = 81\\\begin{array}{r}33 \\+ 48 \\\hline81\end{array}\end{array}$
$\begin{array}{l}73+ 16 = 89\\\begin{array}{r}73 \\+ 16 \\\hline89\end{array}\end{array}$

在〇里填上“＞”“＜”或“=”
$\begin{array}{l}56+ 27 ◯ 83 \\24+ 64 ◯ 88 \\28+ 7 ◯ 35 \\50+ 5 ◯ 45 \\80+ 18 ◯ 98 \\18+ 57 ◯ 80 \\16+ 25 ◯ 40 \\28+ 32 ◯ 50 \\25+ 39 ◯ 35 + 39 \\34+ 17 ◯ 34 + 18 \\46+ 28 ◯ 48 + 28 \\35+ 19 ◯ 19 + 35 \\36+ 18 ◯ 22 + 36 \\29+ 39 ◯ 39 + 37 \\15+ 37 ◯ 35 + 15 \\14+ 29 ◯ 24 + 19 \\53+ 27 ◯ 48 + 24\end{array}$

56+27=83，所以56+27=83；
24+64=88，所以24+64=88；
28+7=35，所以28+7=35；
50+5=55，55＞45，所以50+5＞45；
80+18=98，所以80+18=98；
18+57=75，75＜80，所以18+57＜80；
16+25=41，41＞40，所以16+25＞40；
28+32=60，60＞50，所以28+32＞50；
25+39=64，35+39=74，64＜74，所以25+39＜35+39；
34+17=51，34+18=52，51＜52，所以34+17＜34+18；
46+28=74，48+28=76，74＜76，所以46+28＜48+28；
35+19=54，19+35=54，所以35+19=19+35；
36+18=54，22+36=58，54＜58，所以36+18＜22+36；
29+39=68，39+37=76，68＜76，所以29+39＜39+37；
15+37=52，35+15=50，52＞50，所以15+37＞35+15；
14+29=43，24+19=43，所以14+29=24+19；
53+27=80，48+24=72，80＞72，所以53+27＞48+24。
=；=；=；＞；=；＜；＞；＞；＜；＜；＜；=；＜；＜；＞；=；＞