He is learning his tables.

Several Methods: Were used for multiplication.

作乘法有几种方法.

In a subtraction operation, the number or quantity subtracted from the minuend.

在减法运算中, 从被减数减去的那个数或量.

There will be simple tests in addition, subtraction, multiplication and division.

会有对加、减、乘、除运算的简单测试。

We do addition and subtraction in arithmetic.

在算术里,我们作加减运算.

Addition, subtraction, multiplication, and division are binary operations.

加 、 减 、 乘 、 除都是二元运算.

The simple arithmetic operations are addition, subtraction, multiplication, and division.

简单的算术运算是加法 、 减法 、 乘法和除法.

And the circuit for moving eyes left does mental subtraction.

而控制眼球左转的脑回路同时也负责心算减法.

An approach to speech-sound enhancement is proposed based on the spectral subtraction.

摘要提出了一种基于谱减法的语音增强算法.

Students who cannot even do simple addition and subtraction.

学生甚至不会做简单的加法和减法.

Typical operations are addition, subtraction, multiplication, division, and square root.

典型的操作是加 、 减 、 乘 、 除和平方根的计算.

Mum: Have you learned addition , subtraction, multiplication , and division, Lucy?

妈妈: 露西,你学了加减乘除了 吗 ?

They made a subtraction of 50 dollars from my salary.

他们从我的薪水里扣除了五十美元.

For a whole day they searched after the lost child.

这个走失的孩子他们找了一整天.

We searched here and there, but could not find her.

我们到处找她, 但还是找不到.

We have searched out all the facts we need.

我们已经弄清了我们所需要的全部事实真相.

I have searched my mind for a reason, but can't find one.

我绞尽脑汁寻找理由, 但是没找到.

Nigel has searched for work in a ten-mile radius around his home.

奈杰尔一直在他家周围10英里的范围内找工作。

We searched until we knew it would be pointless to continue.

我们搜索又搜索，直到觉得继续下去也枉然时才罢手。

We searched in all quarters but still couldn't find it.

我们到处寻找,但仍没能找到.

After he felt better, he searched for work at the various mills.

他感到好些后, 就在各工厂找工作.