406759.54

335918,116

\(\frac{637\times527-189}{526\times637+448}\)

\(=\frac{637\times526+527-189}{526\times637-189+637}\)

\(=\frac{1+527-189}{1-189+637}\)

\(=\frac{1-189+527}{1-189+637}\)

\(=\frac{527}{449}=\frac{339}{449}\)

~ Hok tốt ~

trl

=334/449

hok tốt

 = 526 x 637 + 637 - 189 / 526 x 637 + 448

 = 526 x 637 + 448 / 526 x 637 + 448

 = 1

Tk mk nha

tìm a

a=2 mũ 41 nhân 5 mũ 38 

 a = 2⁴¹ . 5³⁸

a) \(\frac{637\times527-189}{526\times637+448}\)

\(=\frac{637\times\left(526+1\right)-189}{526\times637+448}\)

\(=\frac{637\times526+637-189}{526\times637+448}\)

\(=\frac{637+526+448}{526\times637+448}\)

\(=1\)

b) \(\frac{64\times50+44\times100}{27\times38+146\times19}\)

\(=\frac{50\times\left(64+44\times2\right)}{19\times\left(27\times2+146\right)}\)

\(=\frac{50\times\left(64+88\right)}{19\times\left(54+146\right)}\)

\(=\frac{50\times152}{19\times200}\)

\(=\frac{152}{19\times4}\)

\(=\frac{38}{19}\)

\(=\frac{2}{1}\)

\(=2\)

a)1945*240-1000=465800

945+1945*239=465800

b)637*527-189=335510

526*637+448=335510

câu 1

 16 x 25 + 44 x 100

 29 x 96 + 124 x 48

 16 x 25 +44 x 100

=400 + 4400

=4800

29 x 96 +124 x 48

=2784 + 5952

=8736

Vậy 4800

       8736             

Câu 1: 6 x 25 + 44 x 100 

 29 x 96 + 142 x 48

Giải :(6 x 25) + (44 x 100) = 

150 + 440 = 590

 (29 x 96) + (142 x 48) =

2784 + 6816 = 9600

Câu 2 :1994 x 1993 - 1992 x 1993

1992 x 1993 + 1994 x 7 + 1986

Giải : (1994 x 1993) - (1992 x 1993) =

3 974 042  - 3 970 056 = 3986

(1992 x 1993) + (1994 x 7) + 1986 =

 3 970 056 + 13 958 + 1986 = 3 986 000

Câu 3 :  399 x 45 + 55 x 399

 1995 x 1996 - 1991 x 1995

Số x là:
\(637:\left(5+8\right)\times5=245\)
Số y là:
\(245:\dfrac{5}{8}=392\)
#DatNe

pls lam ik nan ni