If the minuend increases by 3.64 and the subtrahend decreases by 2.6, how much does their difference increase?
如果被减数增加3.64，减数减少2.6，那么它们的差增加多少．
<gadget id="calculator">7 + 3.64</gadget>
<output>10.64</output>

<gadget id="calculator">5 - 2.6</gadget>
<output>2.4</output>

<gadget id="calculator">10.64 - 2.4</gadget>
<output>8.24</output>

<gadget id="calculator">7 - 5</gadget>
<output>2</output>

<gadget id="calculator">8.24 - 2</gadget>
<output>6.24</output>

<result>6.24</result>