Question

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Answer 1

Odpowiedź:

Szczegółowe wyjaśnienie:

d)

1 2/7 - 1/2 = 1 - 1/2 + 2/7 = 2/2 - 1/2 + 2/7 = 1/2 + 2/7 = 7/14 + 4/14 =

=  11/14

2 3/4 - 5/12 = 24/12 + 9/12 - 5/12 = 33/12 - 5/12 = 28/12 =

= 28:4/12:4 = 7/3 = 6/3 + 1/3 = 2 + 1/3 = 2 1/3

6 1/6 - 3 3/8 = 6*24/24 + 4/24 - (3*24/24 + 3*3/8*3) =

= 144/24 + 4/24 - (72/24 + 9/24) = 148/24 - 81/24 =

= 67/24 = 48/24 + 19/24 = 2 + 19/24 = 2 19/24

9 5/8 - 5 7/10 = 9*40/40 + 5*5/8*5 - (5*40/40 + 7*4/10*4) =

= 360/40 + 25/40 - (200/40 + 28/40) =

= 385/40 - 228/40 = 157/40 = 120/40 + 37/40 =

= 3 + 37/40 = 3 37/40