Question

17×45-45×2+15×55

Answer 1

\(17\times45-45\times2+15\times55\)

\(=45\times\left(17-2\right)+15\times55\)

\(=45\times15+15\times55\)

\(=15\times\left(45+55\right)\)

\(=15\times100\)

\(=1500\)

Answer 2

Giúp tớ nhanh với ạ

Answer 3

\(17\times45-45\times2+15\times55\)

\(=45\times\left(17-2\right)+15\times55\)

\(=45\times15+15\times55\)

\(=15\times\left(45+55\right)\)

\(=15\times100\)

\(=1500\)

Answer 4

\(17.45-45.2+15.55\)

\(=45.\left(17-2\right)+15.55\)

\(=45.15+15.55\)

\(=15.\left(45+55\right)\)

\(=15.100\)

\(=1500\)