How much bigger is the sum of 7.5 and 0.65 than their difference.
7.5与0.65的和比他们的差大多少．
<gadget id="calculator">7.5 + 0.65</gadget>
<output>8.15</output>

<gadget id="calculator">7.5 - 0.65</gadget>
<output>6.85</output>

<gadget id="calculator">8.15 - 6.85</gadget>
<output>1.3</output>

<result>1.3</result>