September 2018 1 8 Report

Oblicz, korzystając ze wzoru skróconego mnożenia.

a)16 * 24 =

b)120 * 80 =

C)360 * 440 =

d)630 * 570 =

e)74 * 66 =

f)1020 * 980 =

g)4,1 * 3,9 =

h)1,8 * 2,2 =

Oblicz, nie wykonując potęgowania.

a)17^{2} - 16^{2}

b)52^{2} - 48^{2}

c)10,7 ^{2} - 9,3^{2}

d)9,75^{2} - 0,25^{2}


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