1994 x 867 + 1995 x 133

= 1994 x 867 + ( 1994 + 1 ) x 133

= 1994 x 867 + 1994 x 133 + 133 x 1

= 1994 x ( 867 + 133 ) + 133

= 1994 x 1000 + 133

= 1994000 + 133

= 1994

133

Vậy là bằng 1994133

a) 37 x 18 - 9 x 54 + 100

= 37 x 2 x 9 - 9 x 54 + 100

= 74 x 9 - 8 x 54 + 100

= ( 74 - 54 ) x 9 + 100

= 20 x 9 + 20 x 5

= 20 x ( 9 + 5 )

= 20 x 14

= 280

b) 94 + 87 + 81 - 71 - 77 - 84

= ( 94 - 84 ) + ( 87 - 77 ) + ( 81 - 71 )

= 10 + 10 + 10

= 10 x 3

= 30

1994x867+1995x133

= 1994 x 867 + 1995 x133 + 867 - 867

= 1995 x 867 + 1995 x 133 - 867

= 1995 (867 + 133) -867

= 1995000 - 867

= 1994133

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

\(=\frac{32\times2\times50+44\times100}{27\times38+73\times2\times19}\)

\(=\frac{32\times100+44\times100}{27\times38+73\times38}\)

\(=\frac{\left(32+44\right)\times100}{\left(27+73\right)\times38}\)

\(=\frac{76\times100}{100\times38}\)

\(=\frac{76}{38}\)

\(=2\)

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

\(=\frac{64\times50+44\times50\times2}{27\times38+73\times2\times19}\)

\(=\frac{\left(64+44\right)\times50\times2}{27\times38+73\times38}\)

\(=\frac{108\times100}{\left(27+73\right)\times38}\)

\(=\frac{108\times100}{100\times38}\)

\(=\frac{108}{38}\)

\(=\frac{27}{8}\)

giúp em với ạ

62x45+62x37-62x73+822

= 62 x ( 45 + 37 - 73 ) + 822

= 62 x 9 + 822

= 558 + 822

= 1380

# HOK TỐT #

\(\frac{64.50+44.100}{27.38+146.19}\)

= \(\frac{32.2.50+44.100}{27.38+73.2.19}\)

= \(\frac{32.100+44.100}{27.38+73.38}\)

= \(\frac{\left(32+44\right).100}{\left(27+73\right).38}\)

= \(\frac{76.100}{100.38}\)

= \(2\)

12166,59259

lấy máy tính

kết quả =12216,59259

\(64\cdot50+44\cdot\frac{100}{27}\cdot38+146\cdot19\)

\(=3200+\frac{167200}{27}+2774\)

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