Question

tinh tong 

b, 1 / 20 + 3 / 4 + 6 / 5 

c, 3 / 4 + 1 / 25 + 3 / 100 

d, 2 / 25 + 3 / 25 + 7 / 5

Answer 1

`b// 1/20+3/4+6/5=1/20+15/20+24/20=[1+15+24]/20=40/20=2`

`c// 3/4+1/25+3/100=75/100+4/100+3/100=[75+4+3]/100=82/100=41/50`

`d// 2/25+3/25+7/5=2/25+3/25+35/25=[2+3+35]/25=40/25=8/5`

Answer 2

\(\dfrac{1}{20}+\dfrac{3}{4}+\dfrac{6}{5}=\dfrac{1}{20}+\dfrac{15}{20}+\dfrac{24}{20}=\dfrac{1+15+24}{20}=\dfrac{40}{20}=\dfrac{2}{1}=2\)

\(\dfrac{3}{4}+\dfrac{1}{25}+\dfrac{3}{100}=\dfrac{75}{100}+\dfrac{4}{100}+\dfrac{3}{100}=\dfrac{75+4+3}{100}=\dfrac{82}{100}=\dfrac{41}{50}\)

\(\dfrac{2}{25}+\dfrac{3}{25}+\dfrac{7}{5}=\dfrac{2}{25}+\dfrac{3}{25}+\dfrac{35}{25}=\dfrac{2+3+35}{25}=\dfrac{40}{25}=\dfrac{8}{5}\)

Answer 3

tui luoi lam

Answer 4

b) 1/20 + 15/20 + 24/20 = 40/20 = 2

c) 75/100 + 4/100 + 3/100 = 82/100 = (tự rút gọn)

d) 2/25 + 3/25 + 35/25 = 40/25 = 8/5

 

 

Answer 5

`1/20 + 3/4 + 6/5 = 1/20 + 15/20 + 24/20 = (2+15 +24)/20 = 40/20 = 2`

`3/4 + 1/25 + 3/100 = 75/100 + 4/100 + 3/100 = (75 +4+3)/100 = 82/100 = 41/50`

`2/25 + 3/25 + 7/5 = 2/25 + 3/25 + 35/25 = (2+3+35)/25 = 40/25 = 8/5`

 

`#Lanh`

Answer 6

\(b,\dfrac{1}{20}+\dfrac{3}{4}+\dfrac{6}{5}\\ =\dfrac{1}{20}+\dfrac{15}{20}+\dfrac{24}{20}\\ =\dfrac{40}{20}=2\\ c,\dfrac{3}{4}+\dfrac{1}{25}+\dfrac{1}{100}\\ =\dfrac{75}{100}+\dfrac{4}{100}+\dfrac{1}{100}=\dfrac{80}{100}=\dfrac{4}{5}\\ d,=\dfrac{2}{25}+\dfrac{3}{25}+\dfrac{35}{25}=\dfrac{41}{25}\)

Answer 7

Answer 8

b, 1/20 + 3/4 + 6/5

= 1/20 + 15/20 + 24/20

= 2

c,3/4 + 1/25 + 3/100

= 75/100 + 4/100 + 3/100

= 41/50

d, 2/25 + 3/25 + 7/5

= 2/25 + 3/25 + 35/25

= 8/5