(共39张PPT)
88176923
13967582314
65428613
13628359427
one
two
three
four
five
six
seven
eight
nine
ten
eleven
one + nine =
five + two =
seven + five =
one + three =
six + five =
four
seven
eleven
ten
twelve
five + two + one + four =
one + three + six + one =
five + two + four + one =
eleven
twelve
twelve
+ one
eleven
three + nine =
twelve
five + six =
eleven
one+( )=thirteen
fourteen
five
=
( ) +
nine
twelve
= ( ) + ( )
fourteen
fourteen
+ one
Thank you!
Bye-bye !