Multiplication and addition is that you buy a book, play 150 baht/do you want to buy 2 books plus 50 plus 1501 is multiplication is 2 times 150 I returned is 2 books the price 300 baht.
Multiplication and addition is that you buy the book you want to play at 150 baht plus two copies of the 1501 plus 50 is 150 times 2 times I bristling Volume 2 is 300 baht.
Multiplication and addition is that you buy the book around 150) you want to buy the book 2 additive is 1501 plus 50 multiplication is 150คูณ 2 I results that is 2 book price 300 baht.