Toán Lớp 6: $\frac{2}{9}$ -$\frac{-7}{12}$ fast i will vote 5* and tank
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Toán Lớp 6: $\frac{2}{9}$ -$\frac{-7}{12}$ fast i will vote 5* and tank
Comments ( 2 )
Giải đáp:
$\frac{2}{9}$ -$\frac{-7}{12}$=$\frac{2}{9}$ +$\frac{7}{12}$=$\frac{8}{36}$ +$\frac{21}{36}$=
$\frac{29}{36}$
XIN CTLHN
Giải đáp:
Lời giải và giải thích chi tiết:
C1: 2/9 – (-7)/12
= (2.4)/(9.4) – (-7.3)/(12.3)
= 8/36 – (-21)/36
= (8-(-21))/36
= 29/36
C2: Ta có:
2/9 = 8/36
(-7)/12 = (-21)/36
=> 2/9 – (-7)/12
= 8/36 – (-21)/36
= (8-(-21))/36
= 29/36