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\(\frac{9}{5}\times\frac{10}{5}\)
\(=\frac{18}{5}\)
Ta rút gọn ở 10 và 5 thì 10 còn 2 và 5 thì còn 1 rồ bắt đầu nhân lên
kkkkkkkkkkkk nha
9/5 x 10/5 = 9x10 / 5x5 = 9x5x2 / 5x5 = 18/5
3 cái tích nha,mình tích lại cho
4/5 : 2/9 x 2/9 : 4/5
= 4/5 x 9/2 x 2/9 x 5/4
= ( 4/5 x 5/4 ) x ( 9/2 x 2/9 )
= 1x1
= 1
\(\frac{4}{5}:\frac{2}{9}\times\frac{2}{9}:\frac{4}{5}\)
\(=\frac{4}{5}\times\frac{9}{2}\times\frac{2}{9}\times\frac{5}{4}\)
\(=\left(\frac{4}{5}\times\frac{5}{4}\right)\times\left(\frac{2}{9}\times\frac{9}{2}\right)\)
\(=1\times1\)
\(=1\)
525 x 341 + 252 x 659
= 525 x ( 341 + 659 )
= 525 x 1000
= 525000
TK nhé
525 x 341 + 525 x 659
= 525 x ( 341 + 659 )
= 525 x 1000
= 525000
\(\frac{3}{4}:\frac{5}{6}+\frac{1}{4}:\frac{5}{6}\)
\(=\left(\frac{3}{4}+\frac{1}{4}\right):\frac{5}{6}\)
\(=1:\frac{5}{6}\)
\(=1\times\frac{6}{5}\)
\(=\frac{6}{5}\)
\(\frac{3}{4}:\frac{5}{6}+\frac{1}{4}:\frac{5}{6}\)
\(=\left(\frac{3}{4}+\frac{1}{4}\right):\frac{5}{6}\)
\(=1:\frac{5}{6}\)
\(=1\times\frac{6}{5}\)
\(=\frac{6}{5}\)
Trả lời :
25 x 8 x 50 x 125 x 4 x 2
= ( 25 x 4 ) x ( 8 x 125 ) x ( 50 x 2 )
= 100 x 1000 x 100
= 100 000 000
~HT~
#sad
a) \(\frac{13}{19}+\frac{18}{19}+\frac{19}{19}=\left(\frac{13}{19}+\frac{17}{19}\right)+\frac{18}{19}=\frac{20}{19}+\frac{18}{19}=\frac{48}{19}\)
b) \(\frac{3}{5}+\frac{3}{16}+\frac{13}{16}=\left(\frac{3}{16}+\frac{13}{16}\right)+\frac{3}{5}=1+\frac{3}{5}=\frac{5}{5}+\frac{3}{5}=\frac{8}{5}\)
a) \(\frac{13}{19}+\frac{18}{19}+\frac{17}{19}\)
= \(\frac{31}{19}+\frac{17}{19}\)
= \(\frac{48}{19}.\)
b) \(\frac{3}{5}+\frac{3}{16}+\frac{13}{16}\)
= \(\frac{3}{5}+\left(\frac{3}{16}+\frac{13}{16}\right)\)
= \(\frac{3}{5}+\frac{16}{16}\)
= \(\frac{3}{5}+1\)
= \(\frac{3}{5}.\)
\(99\times36+36\)
\(=99\times36+36\times1\)
\(=36\left(99+1\right)\)
\(=36\times100\)
\(=3600\)
a)\(y=\frac{12x30}{15x36}\)=\(\frac{12x15x2}{15x12x3}\)=\(\frac{2}{3}\)
b) \(\frac{21x12}{54x42}\)=\(\frac{21x6x2}{6x9x21x2}\)=\(\frac{1}{9}\)
a) \(\frac{12x30}{15x36}=\frac{4x3x3x10}{5x3x3x12}=\frac{4x10}{5x12}=\frac{2x2x5x2}{5x2x6}=\frac{4}{6}=\frac{2}{3}\)
b) \(\frac{21x12}{54x42}=\frac{3x7x3x4}{18x3x7x6}=\frac{3x4}{18x6}=\frac{3x4}{3x6x6}=\frac{4}{24}=\frac{1}{6}\)
