In the subtraction formula, the minuend is 1.6 larger than the subtrahend, the difference is 1.8 smaller than the subtrahend, and the difference is equal to the number of the minuend.
在减法算式中被减数比减数大1.6，差比减数小1.8，差相当于被减数的多少．
<gadget id="calculator">1.6 + 1.8</gadget>
<output>3.4</output>

<gadget id="calculator">1.6 + 3.4</gadget>
<output>5</output>

<gadget id="calculator">1.6 / 5</gadget>
<output>0.32</output>

<result>0.32</result>