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0,95
22,4
≈0,26
b) (1 i 2/5+ 5/10) :2= ( 1i 2/5 + 1/5):2= 1 i 3/5 :2= 8/5 :2= 8/5 * 1/2= 4/5
c) 5/8 * 4 i 2/10 - (1/4)²= 5/8 * 4 i 1/5 - 1/8= 5/8 * 21/5 - 1/8= 21/8 - 1/8= 20/8= 2 i 4/8= 2 i 1/2
d)4/7 * (2/10+1/4)= 4/7 * (4/20 + 5/20)= 4/7 * 9/20= 9/35
Ps:
/-kreska ułamkowa :)
(1 2\5 + 5\10) :2 = 1 9\10 :2 = 19\20
(5\8 * 4 2\10)- 1\4 do potęgi drugiej = 2 5\8 - 1\16= 2 9\16
4\7 *(2\10 +1\4) = 4\7 * 9\20 = 9\35