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a) 19 +63 =63 +19

b) 20 +0 =20

c) (20 + 3) + 16 = 20 + (3 +16 )

d) (68 x 4) x 20 = 68 x (4 x 20)

e) 20 x 30 = 30 x 20

f) 87 – 41 = 41 – 87

g) 7 x ( 6 – 3 ) = 7 x 6 - 7 x 3

h) 12 x (50 + 15) = 12 x 50 + 12 x 15

(a) ____ × 73 = 73 × 24

(b) Whole numbers are closed under _______ and ________ operation.

(c) Division by ______ is not defined.

(d) _______ is the identity for multiplication.

(e) If ______ is added to a number, the sum will remain the same. Hence ______is called the __________ in the whole numbers.

(a) 838 × 103

(b) 91625 × 179 - 91625 ×79

(a) 8 × 391 × 125

(b) 2 × 1234 × 50

(c) 87 + 64 + 36

(d) 713 + 87 + 200

1) Shelly got 49 marks in Math, 39 marks in English, and 51 in Science. John got 62 marks in Math, 32 in English and 54 in Science. What are their total marks?

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

3) In a bouquet, there are 7 roses 8 gladioli. In 9 bouquets, how many flowers are there? Write in mathematical statement for this.

4) Jai eats form a hotel which charges $ 55 for lunch and $ 45 for dinner. Find the money he has to pay for seven days.

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