100 x 10 =

112 x 102

5721 x 2345 = 2345 x _______

________ x 666 = 666

Multiply  15 x 13 

Multiply 89 x 45

1x  ____ = 90

(20 x 30) x  ___ = 20 x (30 x 60) 

24 x 10 = 

12x 1000 =