Toán Lớp 6: i, 5/3 + (-2/7) – (-1,2)
j,0,25 + 3/5 – (1/8 – 2/5 + 5/4)
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Toán Lớp 6: i, 5/3 + (-2/7) – (-1,2)
j,0,25 + 3/5 – (1/8 – 2/5 + 5/4)
Comments ( 2 )
$=\dfrac{5}{3}-\dfrac{2}{7}+1,2$
$=\dfrac{29}{21}+1,2$
$=\dfrac{271}{105}$
j,
$=0,25+\dfrac{3}{5}-\dfrac{1}{8}+\dfrac{2}{5}-\dfrac{5}{4}$
$=0,25+0,6-0,125+0,4-1,25$
$=(0,25-1,25)+(0,6+0,4)-0,125$
$=-1+1-0,125$
$=-0,125$