A) IN THE FOLLOWING CALCULATIONS, EACH NUMBER IS REPLACED BY A...

Câu 7. a) In the following calculations, each number is replaced by a picture. Which numbers do these pictures replace?

;

+ =

- ₌

x =

=

^…………

, =

^…………

, =

^…………b) A travel agency often receives mails from local and foreign customers. Some sent their mails on March 2

^nd

and some on February 3

^rd

. Confusion happened when the travel agents read the contracted forms of the dates 2/3 or 3/2, they were confused because they were not certain that the date was March 2

^nd

or February 3

^rd

. However, when dates are written as 3/15 or 15/3, they will understand that it is March 15

^th

because there are only 12 months in a year. How many days in a year may people be confused as above mentioned? ………..