rút gọn rồi tính :
2/8 + 5/6 1/4 + 6/30 1/8 + 12/6 12/18 + 12/42
ghi rõ ràng lời giải ra nhé
rút gọn rồi tính :
2/8 + 5/6 1/4 + 6/30 1/8 + 12/6 12/18 + 12/42
ghi rõ ràng lời giải ra nhé
$\frac{2}{8}$ + $\frac{5}{6}$ = $\frac{6}{24}$ + $\frac{20}{24}$ = $\frac{26}{24}$ = $\frac{13}{12}$
$\frac{1}{4}$ + $\frac{6}{30}$ = $\frac{15}{60}$ + $\frac{12}{60}$ = $\frac{27}{60}$ = $\frac{9}{20}$
$\frac{1}{8}$ + $\frac{12}{6}$ = $\frac{3}{24}$ + $\frac{48}{24}$ = $\frac{51}{24}$ = $\frac{17}{8}$
$\frac{12}{18}$ + $\frac{12}{42}$ = $\frac{2}{3}$ + $\frac{2}{7}$ = $\frac{14}{21}$ + $\frac{6}{21}$ = $\frac{20}{21}$
Học tốt ^^
2/8+5/6=1/4+5/6=3/12+10/12=13/12
1/4+6/30=1/4+1/5=5/20+4/20=9/20
1/8+12/6=1/8+2=1/8+16/8=17/8
12/18+12/42=2/3+2/7=14/21+6/21=20/21.