Question

Oblicz :
a) 8 3/4 + 1,125 =
b) 1,75 - 5/6 =
c) 3 1/5 - 2,25 =
d) 6,8 - 5 1/4 =
e) 6,4 x 5/8 =
f) 2/15 x 0,75 =
g) 1 3/7 x 0,056 =
h) 2,4 : 1 3/5 =
i) 3 3/4 : 0,05 =
j) 2 5/6 : 3,4 =

Answer 1

A) = 9 7/8
b) = 11/12
c) = 19/20
d) = 1 11/12
Reszte oblicz sobie na tej stronce
Link: http://www.math.edu.pl/narzedzia.php?nr=5628451

Answer 2

a) 8 3/4 + 1,125 = 8,75 + 1,125 = 9,875
b) 1,75 - 5/6 = 1 3/4 - 5/6 = 7/4 - 5/6 = 43/24 - 20/24 = 23/24
c) 3 1/5 - 2,25 = 3,2 - 2,25 = 0,95
d) 6,8 - 5 1/4 = 6,8 - 5,25 = 1,55
e) 6,4 * 5/8 = 32/5 * 5/8 = 4/1 * 1/1 = 4
f) 2/15 * 0,75 = 2/15 * 3/4 = 1/5 * 1/2 = 1/10 = 0,1
g) 1 3/7 * 0,056 =  10/7 * 56/1000 = 1/1 * 8/100 = 8/100 = 0,08
h) 2,4 : 1 3/5 = 12/5 : 8/5 = 12/5 * 5/8 = 3/1 * 1/2 = 3/2 = 1 1/2 = 1,5
i) 3 3/4 : 0,05 = 15/4 : 5/100 = 15/4 * 100/5 = 3/1 * 25/1 = 75/1 = 75
j) 2 5/6 : 3,4 = 17/6 : 17/5 = 17/6 * 5/17 = 1/6 * 5/1 = 5/6