4747/5050 + 232323/252525

=47/50+23/25

=97/50

\(\frac{4747}{5050}+\frac{232323}{252525}=\frac{47\cdot101}{50\cdot101}+\frac{23\cdot10101}{25\cdot10101}\)

\(=\frac{47}{50}+\frac{23}{25}=\frac{93}{50}\)

\(=\frac{47\times101}{50\times101}+\frac{23\times10101}{25\times10101}\)

\(=\frac{47}{50}+\frac{23}{25}\)

\(=0,94+0,92\)

\(=1,86\)

670424

200000+9999+4747+455678=670424

670424

2 7 + 4 7 = 6 7 6 7 - 2 7 = 4 7 6 7 - 4 7 = 2 7 4 7 + 2 7 = 6 7

2 3 × 4 7 = 8 21 8 21 : 2 3 = 8 21 × 3 2 = 4 7 8 21 : 4 7 = 8 21 × 7 4 = 2 3 4 7 × 2 3 = 8 21

\(\dfrac{373737}{474747}+\dfrac{5757}{4747}\) 

\(\left(=\dfrac{373737:10101}{474747:10101}+\dfrac{5757:101}{4747:101}\right)\)

\(=\dfrac{37}{47}+\dfrac{57}{47}=\dfrac{37+57}{47}=\dfrac{94}{47}=2\)

toán lớp 5 nâng cao  à?

\(=\dfrac{373737:10101}{474747:10101}+\dfrac{5757:101}{4747:101}=\dfrac{37+57}{47}\)

\(=2\)

Số kiểu này thì sao mà làm được bạn

A=37/47+57/47

A=94/47
 

A = 373737/474747 + 5757/4747

A = 379494/479494

A = 2

thank

Ta có : 4747 - [ ( 45 . 24 - 52 -12 ) : 14] 

          = 4747 -[ ( 1080 - 64 ) : 14 ]

          = 4747 - ( 1016 : 14)

           = 4747 - \(\frac{508}{7}\)

          = \(\frac{32721}{7}\)