Question

1.Tính nhanh

a: 2.17.12+4.6.21+8.3.62

b: 37.24+37.76+63.79+63.21

Answer 1

\(2.17.12+4.6.21+8.3.62\)

\(=24.17+24.21+24.62\)

\(=24\left(17+21+62\right)\)

\(=24.100\)

\(=2400\)

Answer 2

\(37.24+37.76+63.79+63.21\)

\(=37\left(27+76\right)+63\left(79+21\right)\)

\(=37.100+63.100\)

\(=3700+6300\)

\(=10000\)

Answer 3

 

1.Tính nhanh

a: 2.17.12+4.6.21+8.3.62

=

b: 37.24+37.76+63.79+63.21

= 37.(24+76)+63. (79+21)

= 37.100+63.100

= 3700+6300

= 10000

Answer 4

đề của bn sai kìa

36.24+36.76+63.79+63.21 

mà bn