1)11·8=88
2)0,6·7=4,2
3)мы получается 1√2*4+1=√49=7
4)тоже мы √10*16+9=√169=13
5)0,2*9*5=90
6)0,3*4*0,2=0,24
7)-
8)11/12*9/4=12 и 9 сокращаем на 3 получается 11/4*3/4=33/8
превращаем в неправильную дробь получается: 4 1/8
/- это дробь
1.
a) 1.25^4 x 8^4
=(1.25 x 8)^4
=10^4
b) 6^12/36 x 6^9
=6^3/6^2
=6
2.
a) 21x^3y^2 x (-4/7x)
=-3x^3y^2 x 4x
= -12x^4y^2
b) -0.25a^2b^4 x (-8ba^3)
=-0.25a^2b^4 x (-8a^3b)
=2a^5b^5
3.
a) -3a^8b^3 x 2ab^6
=-6a^8b^3+6a^1
=-6a^8+1b^9
=-6a^9b^9
b) -98xy^3 x (1/7x^2)^2
=-98xy^3 x 1/49x^4
=-2xy^3x^4
=-2x^5y^3
c) (-4ab^3)^3 x (a^2b)^2
=-(4ab^3)^3 x (a^2b)^2
=-64a^3b^9a^4b^2
=-64a^7b^11
4. ?
5.
3 x 3^3 x -1/3^2
=-3 x 3^3 x 3^-2
=-3^2
=-9
1 1*√3 √3
```` = ````````` = ````````
√3 √3 *√3 3
√10 + 8 (√10 +8)(√10 +8) (√10+8)² 10+16√10 +64 -37-8√10
``````````` = ````````````````````````` = `````````` = ```````````````````` = ``````````
√10 - 8 (√10 -8)(√10+8) 10 - 64 - 54 27
1 5+√5 5+√5 5+√5
````` = ``````````````````` = ``````````` = ````````````
5-√5 (5- √5)(5+√5) 25 -5 20