\(\frac{5}{27}+\frac{3}{4}+\frac{22}{27}+\frac{1}{4}\)

\(=\left(\frac{5}{27}+\frac{22}{27}\right)+\left(\frac{3}{4}+\frac{1}{4}\right)\)

\(=1+1\)

\(=2\)

\(\frac{89}{92}-\frac{30}{92}-\frac{59}{92}\)

\(=\frac{89-30-59}{92}\)

\(=\frac{59-59}{92}\)

\(=\frac{0}{92}\)

\(=0\)

58 + 92 -73:11

=58 + 92 -73/11

=150-73/11

=1577/11

25+72:(24+1)+72

=25+72:25+72

=25+2,88+72

=27,88+72

=99,88

\(=150-\frac{73}{11}=\frac{1577}{11}\)

\(=25+72:25+72=25+72:\left(25+1\right)=25+72:26=25+3=28\)

Ta có :

\(\frac{5}{9}\times\frac{2}{7}=\frac{10}{63};\frac{2}{3}+\frac{5}{6}=\frac{3}{2}\)               \(5-\frac{13}{17}=\frac{72}{17};\frac{9}{11}:\frac{5}{13}=\frac{117}{55}\)

\(5+\frac{9}{14}=\frac{79}{14};\frac{6}{54}:8=\frac{1}{72}\)               \(\frac{24}{72}-\frac{202}{909}=\frac{1}{9};\frac{9}{11}:\frac{5}{13}=\frac{117}{55}\)

Học tốt nha !

#Sơn#

5/9\(\times\)2/7=10/63

2/3+5/6=4/6+5/6=9/6=3/2

5+9/14=70/14+9/14=79/14

6/54:8=1/9:8=1/9\(\times\)1/8=1/72

5-13/17=85/17-13/17=72/17

3:9/10=3\(\times\)10/9=30/9=10/3

24/72-202/909=1/9

9/11:5/13=9/11\(\times\)13/5=117/55

34/7; 89/26; 46/15

thấy sai sai :')

68 : 14 = 4 ( dư 12 )

89 : 26 = 3 ( dư 11 )

92 : 30 = 3 ( dư 2 )

dễ

=(7x3)/(3x23)+(4x4)/(23x4)+12/23-(16x2)/27x2)

=7/23+4/23+12/23-16/27

=23/23-16/27

=1-16/27=11/27

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+34+25+26+27+28+29+30=475

Bằng 465

b) 14/15

c)39/65

b) 14/15 ; 17/51

c) (Mình không thấy có phân số nào rút gọn được nữa)

(1+19)+(2+18)+(3+17)+(4+16)+(5+15)+(6+14)+(7+13)+(8+12)+(9+11)+20

=20+20+20+20+20+20+20+20+20+20

=20x10

=200

=210

tk mình nha