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a,7429-(3125+4297)
=7407-93103+4297)
=7407-7400
7
b,9/8-(17/7-3/7)+7/8
=(9/8 +7/8)-(17/7-3/7)
=2-2
=0
c,tự làm nhé..
a) \(\frac{3}{5}\times\frac{8}{27}\times\frac{5}{3}\)
\(=\left(\frac{3}{5}\times\frac{5}{3}\right)\times\frac{8}{27}\)
\(=1\times\frac{8}{27}\)
\(=\frac{8}{27}\)
b) \(\frac{7}{19}\times\frac{1}{3}+\frac{7}{19}\times\frac{2}{3}\)
\(=\frac{7}{19}\times\left(\frac{1}{3}+\frac{2}{3}\right)\)
\(=\frac{7}{19}\times1\)
\(=\frac{7}{19}\)
a) \(\left(\frac{3}{5}.\frac{5}{3}\right).\frac{8}{27}\)
= \(1.\frac{8}{27}\)
=\(\frac{8}{27}\)
b) \(\frac{7}{19}.\left(\frac{1}{3}.\frac{2}{3}\right)\)
= \(\frac{7}{19}.\frac{2}{9}\)
=\(\frac{14}{81}\)
Không biết có đúng không? Tick mình nha !
a)=384:(25*4)=384:100=3,84.
b)37/25:5/4:74/25=37/25*4/5*25/74=37*4*25/5*25*74=2/5.
c)380:(38*2)=(380:38):2=10:2=5.
d)6/11:4/3:5/11:4/3=6/11*3/4*11/5*3/4=6*3*11*3/11*4*5*4=27/40.
k nha
\(\frac{7}{19}\)x\(\frac{1}{3}\)+\(\frac{7}{19}\)x\(\frac{2}{3}\)=\(\frac{7}{19}\)x(\(\frac{1}{3}\)+\(\frac{2}{3}\))=\(\frac{7}{19}\)x1=\(\frac{7}{19}\)
\(\frac{7}{19}\)x \(\frac{1}{3}\)x \(\frac{7}{19}\)x \(\frac{2}{3}\)
= \(\frac{7}{19}\)x (\(\frac{1}{3}\)+ \(\frac{2}{3}\))
= \(\frac{7}{19}\)x 1
= \(\frac{7}{19}\)
Chúc bạn học tốt!
a,7429-(3125+429)
=7429-3125-429
=(7429-429)-3125
=7000-3125
=3875
b,\(\frac{19}{37}+\left(1-\frac{19}{37}\right)\)
=\(\frac{19}{37}+1-\frac{19}{37}\)
=\(\frac{19}{37}-\frac{19}{37}+1\)
=\(0+1\)
=\(1\)
a) 7429-(3125+429)=7429-3125-429=7429-429-3125=7000-3125=3875
b) 19/37+(1-19/37)=(19/37-19/37)+1=0+1=1