Алгебра/Рақамҳо

Синфҳои Рақамҳо

Рақамҳои шуморидашаванда

Ракамҳои шуморидашаванда бо ҳарфи ишора мешаванд N. Рақамҳои шуморидашаванда калон аз 0 мебошанд.

$\mathbb {N} ={1,2,3,4...}$

Санҷиш

Рақамҳоро аниқ кунед.

1. ${\sqrt {7}}$

2. $-{\sqrt {36}}$

3. $(-4)^{2}$

Хосияти додашударо аниқ кунед.

1. $2\cdot \!3=3\cdot \!2$

2. $x\left({\frac {1}{x}}\right)=1$

3. $x+(-x)=0\,$

Барои содда кардани додаҳо ҷамъ ҳисоб кунед.

1. $3(2x+7)\,$

2. $15(6x-22)\,$

3. $3(20x+42y)-2(7x+20y)\,$

Ҷавобҳо

1. Irrational and Real

2. Integer, Rational, Real (Note that the negative comes after the square root!)

3. Natural, Whole, Integer, Rational, and Real (Note that the negative comes before squaring, because it's in parentheses!)

1. Commutative Property of Multiplication

2. Inverse Property of Multiplication

3. Inverse Property of Addition

1. 6x + 21

2. 90x - 330

3. 46x + 86y (Don't forget to combine like-terms. Also, don't forget that you're subtracting 40y!)