Autorzy:Krystyna Zarzycka, Piotr Zarzycki
Wydawnictwo:GWO
Rok wydania:2014
Oblicz w pamięci :4.55 gwiazdek na podstawie 11 opinii

Oblicz w pamięci :

1Zadanie

a) 

`2/3 +1 2/3 = 1 4/3 = 2 1/3`

`2 5/7 - 1 6/7 = 1 12/7 - 1 6/7 = 6/7`

`3/9 * 10 = 30/9 = 10/3 = 3 1/3`

`1 2/3 : 1/3 = 5/3 * 3/1 = 5/1 = 5`

`(2/5)^2 = 4/25`

`(1/3)^3 = 1/27`

`(1 1/4)^2 = (5/4)^2 = 25/16`

`(1 1/2)^3 = (3/2)^3 = 27/8 = 3 3/8`

b)

`4,5 + 6,5 = 11`

`2,3 - 4,1 = -(4,1 - 2,3) = -1,8`

`(-6,75) * 10 = -67,5`

`83,44 : (-10) = -8,344`

`5,51 * 0,1 = 0,551`

`2,7:0,1 = 2,7 * 10 = 27`

c)

`x+13x = 14x`

`34x - 27x = 7x`

`4*(4x) = 16x`

`5*(2*2x) = 5*4x = 20x`

`6y : 2 = 3y`

`2*(3x+5y) = 6x + 10y`

`(4x-2y) :2 = 2x-y`