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4 + 40 + 6 + 60 + 10 x 5
= (4 + 6) + (40 + 60) + 50
= 10 + 100 + 50
= 110 + 50
= 160
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Đề đọc khó hiểu quá bạn. Bạn nên viết lại để mọi người hỗ trợ tốt hơn.
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60 - 26,75 - 13,25
= 60 - (26,75 + 13,25)
=60 - 40= 20
NHỚ CHO MÌNH NHA
60 - 26,75 - 13,25
= 60 - ( 26,75 + 13,25 )
= 60 - 40
= 20
Chúc bạn học tốt!
k mik nha!
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`1/10+2/20+3/30+4/40+5/50+6/60+7/70+8/80+9/90`
`=1/10+1/10+1/10+1/10+1/10+1/10+1/10+1/10+1/10`
`=1/10xx9`
`=9/10`
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\(\frac{1}{10}+\frac{2}{20}+\frac{3}{30}+\frac{4}{40}+\frac{5}{50}+\frac{6}{60}+\frac{7}{70}+\frac{8}{80}+\frac{9}{90}\)
=\(\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}\)
=\(\frac{9}{10}\)
\(\frac{1}{10}+\frac{2}{20}+\frac{3}{30}+\frac{4}{40}+\frac{5}{50}+\frac{6}{60}+\frac{7}{70}+\frac{8}{80}+\frac{9}{90}=\frac{1}{10}+\frac{1}{10}+....+\frac{1}{10}=\frac{9}{10}\)
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50-51+40-41+30-31+60
=-1+(-1)+(-1)+60
=-3+60
=57
![](https://rs.olm.vn/images/avt/0.png?1311)
rút gọn mấy phân số trên thì còn
=1/10+1/10+1/10+1/10+1/10+1/10+1/10+1/10+1/10
=9x1/10
=9/10
\(\frac{1}{10}+\frac{2}{20}+\frac{3}{30}+\frac{4}{40}+\frac{5}{50}+\frac{6}{60}+\frac{7}{70}+\frac{8}{80}+\frac{9}{90}\)
\(=\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}\)
\(=\frac{1}{10}\times9\)
\(=\frac{9}{10}\)
\(0,6x12+60\%x87+\frac{6}{100}\)
\(=0,6x12+0,6x87+0,06\)
\(=0,6x\left(12+87\right)+0,06\)
\(=0,6x99+0,06\)
\(=59,4+0,06\)
\(=59,46\)