<p>Solve: (a)&nbsp;<span class="math-editor mathquill-rendered-math">+<span class="mtable non-leaf"><span class="mtr non-leaf"><span class="mtd"><span class="roman font">43.75</span></span></span><span class="mtr non-leaf"><span class="mtd"><span class="roman font">40.92</span></span></span></span></span>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (b) &nbsp;<span class="math-editor mathquill-rendered-math">&minus;<span class="mtable non-leaf"><span class="mtr non-leaf"><span class="mtd"><span class="roman font">94.32</span></span></span><span class="mtr non-leaf"><span class="mtd"><span class="roman font">57.88</span></span></span></span></span></p>
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