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English 21 Public

numbers

Study Slideshow

Что такое выражение

Числа, символы и операторы (такие как + и ×), сгруппированные вместе, которые показывают значение чего-либо.

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3у+1, это пример чего?

Выражении

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What is formula?

A formula is a mathematical rule or relationship that uses letters to represent amounts which can be changed

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Give example of formula

Perimeter of square = 4 × side length

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______ in math is a symbol for a value we don't know yet. It is usually a letter like x or y.

Variables

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z+7=87, what z here?

variable

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Translation of Substitute?

Заменять

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When x=5, what is x + x/2 ?

5 + 5/2 = 5 + 2,5 = 7,5

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If x=5 and y=2, then what is x2 + xy ?

35

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When x=7, what is 140/x + 16

36

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what is the power of 10c of c=7

10.000.000

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what is the power of 10c of c=4

10.000

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what is the power of 10c of c=6

1000.000

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Place value of 4 in 1420

400

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Place value of 7 in 7045

7000

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Place value of 4 in 87045

40

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