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b; \(\dfrac{5}{14}\) \(\times\) \(\dfrac{7}{13}\) x \(\dfrac{26}{25}\)
= \(\dfrac{5\times7\times2\times13}{7\times2\times13\times5\times5}\)
= \(\dfrac{5\times7\times2\times13}{5\times7\times2\times13}\) x \(\dfrac{1}{5}\)
= 1 x \(\dfrac{1}{5}\)
= \(\dfrac{1}{5}\)
Mik nek cảm ơn các cậu nha nhưng mik có thể đc 10 k do những tr ehan ủi nên nó đc đâu
a. 6 và 5/3 + 7 và 13/8 +3 và 1/3- 4 và 5/8
=23/3+69/8+4/3-37/8
=391/24+4/3+37/8=141/8-37/8=103/8
b.=(27/5+69/11)-(17/5-52/11)
=642/55+73/55=13
số số hạng lẻ từ 5-->17 là
(17-5):2+1=7(số số hạng)
tổng từ 5 đến 17 là
(17+5)x7:2=77
vậy KQ bài này là
2.3x77=1771/10=177.1
đáp số 177.1
2/3*5+2/3*7+2/32/3*9+2/3*11+2/3+2/3*15+2/3*17
=2/3*5+2/3*7+2/3*9+2/3*11+2/3*1+2/3*15+2/3*17
=2/3*(5+7+9+11+15+17+1)
=2/3*56
=
A, 476/429
B, 1/5
2250 kg rau
A. \(\frac{476}{429}\)
B. \(\frac{1}{5}\)
2250KG
2250
hok tốt nhé
A) \(\frac{21}{11}\)' \(\frac{7}{13}\)'\(\frac{68}{63}\) B) \(\frac{26}{25}.\frac{7}{13}.\frac{5}{14}\)
=\(\frac{3}{11}\)'\(\frac{1}{3}\)' \(\frac{68}{63}\) = \(\frac{26}{25}.\frac{1}{13}.\frac{5}{2}\)
=\(\frac{3}{33}\)' \(\frac{68}{63}\) = \(\frac{26}{25}\frac{5}{26}\)
=\(\frac{1}{33}\)' \(\frac{68}{21}\) = \(\frac{1}{5}.\frac{1}{1}\)
=\(\frac{68}{396}\) = \(\frac{1}{5}\)
=\(\frac{17}{74}\)
NHỚ K CHO MIK NHA ^^
2250 kg rau
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