Solve: 15 x 12  - 5 x 12.

If ________ is added to a number, the sum will remain the same.

If any two whole numbers a  and b are  added, a to b or b to a, the _______ is always _____.

Find the missing number  and state the property involved in  49 + 88 + 51 = 88 + ___.

1 + 2 is a whole  number. The  property of addition used here is

The smallest whole number is

The number of students in each class of a school is 25. The fees paid by each student is Rs. 812 per month. If there are 40 classes in the school. What is the total fee collection in a month ?

867 x _____ = 867.

Amal  scores 52 runs in the first innings and 78 runs in the  second innings.  Rahul scores 78 runs in the first innings and 52 runs in the second innings.  Then which of the following is correct?

(46 + 4 ) + 8 = 46 + ( 8 +  __ )