Multiplications and divisions are really just many additions and subtractions.

乘法和除法实际上只是许多加法和减法累积。

Math often builds on a set of basic skills like addition, subtraction, multiplication and division.

数学基础技能外乎加减乘除。

Not long ago, researchers learned that 4-day-olds could understand addition and subtraction.

，研究人员了解到4天孩子可以明白加减法。

To decarbonise an economy is not a simple subtraction; it requires a near-complete overhaul.

济脱碳是简单减法;这需要近乎彻底改革。

Addition and subtraction are both part of math equations.

加减法两者都是数学方程式一部分。

Subtraction is not just about removing day-to-day distractions.

减法仅仅是减去日常生活中干扰。

Additions or subtractions to our external circumstances make very little difference.

增加或减少外部环境 产生区别很小。

And a little bit about pOH, which can be calculated with logarithms, also with subtraction.

它们通常也有很低pH值。

Where do you stand on addition, subtraction, multiplication and division?

加法与减法乘法与除法是什么情况？

Can you do some subtraction for me?

能帮我做一些减法吗？

Firms are not always opposed to subtraction.

公司并总是反对减法。

If it's addition or subtraction it's only the number of figures after the decimal point that matters.

第一，它告诉已测量数据是多少。 第二，它告诉这个值是测量到多精准。

But scientists have found that other animals, such chimpanzees, monkeys, and even pigeons can perform some addition and subtraction.

但科学家发现，黑猩猩、猴子、甚至鸽子等其它动物也能做一些加法和减法。

This spectrum subtraction is what happens as sunlight interacts with the elements in the sun's atmosphere and in earth's atmosphere too.

当太阳光与太阳大气中元素以及地球大气中元素相互作用时，就会发生频谱相减。

ENIAC could perform 5000 ten-digit additions or subtractions per second, many, many times faster than any machine that came before it.

ENIAC 每秒可执行 5000 次十位数加减法，比它辈快很多很多倍。

Math skills such as addition, subtraction, multiplication and division should already be mastered.

应该已掌握了加减乘除等数学技能。

Circuits can be combined to perform complex operations, like addition and subtraction.

可以组合电路来执行复杂运算，例如加法和减法。

I just can't seem to get the rules straight for addition, subtraction, multiplication and division.

我似乎无法直接理解加法、减法、乘法和除法规则。

I think of addition and subtraction as on a number line.

我认为加法和减法就像在数轴上一样。

'A lot of subtraction, too, ' he said, dryly.

“还有很多减法，”他冷冷地说。