Es n 97 la numero 2 pls
Es n 97 la numero 2 pls
2 + 1/4 - 2/5 + 3/20=
=(2·20 + 1·5 - 2·4 + 3)/20=
=(40 + 5 - 8 + 3)/20=
=40/20=2
(40+5-8+3)/20 = 40/20 = 2
97/2)
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$\small 2+\dfrac{1}{4}-\dfrac{2}{5}+\dfrac{3}{20}=$
minimo comune multiplo dei denominatori = 20, quindi moltiplica tutto per 20:
$\small = \dfrac{40+5-8+3}{20}=$
$\small = \dfrac{\cancel{40}^2}{\cancel{20}_1}= 2$
(11+4-10)/12 = 5/12
(15+8-2)/12 = 21/12
(6-5+3)/10 = 2/5
(54-45+10)/30 = 19/30
(12-9+6)/24 = 9/24 = 3/8
(20+6-8)/15 = 18/15 = 6/5