Trả lời
a)4/5.9/7-4/5.3/14
=4/5(9/7-3/14)
=4/5(18/14-3/14)
=4/5.15/14
=6/7
b)13/50+9%+41/100+24%
=13/50+9/100+41/100+24/100
=26+9+41+24/100
=(26+24)+(9+41)/100
=100/100
=1
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\(\frac{4}{5}\cdot\frac{9}{7}-\frac{4}{5}\cdot\frac{3}{14}\)
=\(\frac{4}{5}\cdot(\frac{9}{7}-\frac{3}{14})\)
=\(\frac{4}{5}\cdot\frac{15}{14}\)
=\(\frac{6}{7}\)
b,\(\frac{13}{50}\)+9%+\(\frac{41}{100}\)+24%
=26%+9%+41%+24%
=100%=1
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