<span>47+21=68</span>
<span>68-21=47</span>
<span>
</span>
<span><span>34+54=88</span></span>
<span><span>88-54=34</span></span>
<span><span>
</span></span>
<span><span><span>28+29=57</span></span></span>
<span><span><span>57-28=29</span></span></span>
<span><span><span>
</span></span></span>
<span><span><span><span>24+75=99</span></span></span></span>
<span><span><span><span>99-75=24</span></span></span></span>
<span><span><span><span>
</span></span></span></span>
<span><span><span><span><span>38+47=85</span></span></span></span></span>
<span><span><span><span><span>85-47=38</span></span></span></span></span>
<span><span><span><span><span>
</span></span></span></span></span>
<span><span><span><span><span><span>65+27=92</span></span></span></span></span></span>
<span><span><span><span><span><span>92-65=27</span></span></span></span></span></span>