9.100=
9.100=
100+100+300-100-100*100-100=
x+100=100+100+100+100+200:5
(100-1).(100-2). ... .(100-99).(100-100)=???
100 + 100 + 100 + 100 + 100 + 10 = ?
tính nhanh
tính nhanh
100 + 100 x 100 + 100 x 100
(100-1) x (100-2) x ... x (100-99) x(100-100)
( 100 - 1 ) x ( 100 - 2 ) x . . . x ( 100 - 99 ) x ( 100 - 100 )