Their first device could add, subtract, multiply and divide.
他们的第一款装置可以进行加、减、乘、除运算。
The little girl has begun to learn to add and subtract.
这小女孩已在学做加减法了。
Now, you can still add or subtract whatever you want in your life.
现在，你可以增加或减少你觉得有必要增减的东西。
Once you create them, you can add, subtract, and update the values in the list.
创建列表之后，您可以添加、删除和更新列表中的值。
The little boy can add, subtract and multiply , but cannot divide.
那小男孩会做加法、减法和乘法，但不会做除法。
You also learn how to add and subtract in your head.
你也应该学会加减法的心算。
You must learn to add and subtract in arithmetic.
学算术要学会加法和减法。
They can add, subtract and do other mathematical work.
他们可以加，减，并做其他数学工作。
The little boy can add, subtract and multiply, but cannot divide.
那小男孩会做加法、减法和乘法，但不会做除法。
You should also see the return values of the add and subtract operations.
您也应该看到加法操作和减法操作的返回值。
It doesn't matter whether we add a negative number or subtract a positive one.
我们加负数还是减正数，这并没有什么关系。
I can use an application to add and subtract.
我能使用应用程序进行加和减。
He is learning to add and subtract.
他正在学习加减法。
In their first year at school, most children learn to ADD and subtract.
入学第一年，多数孩子学习加减法。
At 5, my home schooled daughter already knows how to add and subtract.
我女儿在家学习，她五岁，已经学会了加减法。
They do not know how to add and subtract, they just understand letters.
他们不懂什么是加减，他们只认字母。
Add a rectangle path and set it to Subtract mode.
添加一个矩形路径并将其设置为减去模式。
Add a rectangle path and set it to Subtract mode.
添加一个矩形路径并将其设置为减去模式。
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