Multiplication and addition is that you buy a book you want to buy 150 baht for 2 books plus is 150 150 150 plus 2 multiplication is multiplication, I returned is 2 books the price 300 baht.
Multiplication and addition is that you buy the book you want to buy two copies of the 150 baht plus 150 plus 150 is 150 times 2 times I bristling Volume 2 is 300 baht.
Multiplication and addition is that you buy the book you want to buy? 150 baht 2 volume addition is 150 plus 150 multiplication is 150คูณ 2 I results that is 2 book price 300 baht.