In a decimal subtraction operation, the difference is 5.25. If the minuend is increased by 0.5 and the subtrahend is decreased by 0.4, what is the difference now?
在一个小数减法算式中，差是5.25，如果被减数增加0.5，减数减少0.4，那么现在的差是多少
<gadget id="calculator">0.4 + 0.5</gadget>
<output>0.9</output>

<gadget id="calculator">5.25 + 0.9</gadget>
<output>6.15</output>

<result>6.15</result>