Question

Tính nhanh:  3.63+5.13+6.63+8.13+9.63+11.13+12.63+14.13+15.63+17.13+18.63

Answer 1

= 189+65+378+104+567+143+756+182+945+221+1134

=4684

Answer 2

\(3\cdot63+5\cdot13+6\cdot63+8\cdot13+9\cdot63+11\cdot13+12\cdot63+14\cdot13+15\cdot63+17\cdot13+18\cdot63\)\(=\left(3\cdot63+6\cdot63+9\cdot63+12\cdot63+15\cdot63+18\cdot63\right)+\left(5\cdot13+8\cdot13+11\cdot13+14\cdot13+17.13\right)\)\(=63\left(3+6+9+12+15+18\right)+13\left(5+8+11+14+17\right)\)
\(=63\cdot63+15\cdot55\)
\(=3969+825\)
\(=4794\)

Answer 3

May bon Dien cha Lợi cho tao di

 

Answer 4

=189+65+378+104+567+143+756+182+945+221+1134=4684

Answer 5

các bạn giải bài này giúp mik vs