In formula 278-65. How much does the difference decrease if the subtrahend is increased by 100
在算式278-65中．如果把减数增加100，那么差减少多少
<gadget id="calculator">278 - 65</gadget>
<output>213</output>

<gadget id="calculator">100 + 65</gadget>
<output>165</output>

<gadget id="calculator">278 - 165</gadget>
<output>113</output>

<gadget id="calculator">213 - 113</gadget>
<output>100</output>

<result>100</result>