Answers: Exercise 1 Whole Numbers

1)  3 400 075

2)  the place value of digit 8 in the number 8 341 695 is millions

3)   6 279 310 = 6 millions + 2 hundred thousands + 7 ten thousands + 9 thousands                           + 3 hundreds + 1 tens

4)  Round off  7 720 150 to the nearest millions.      8 000 000 ÷ 1 000 000 = 8.0 million

5)  0.4 million + 600 000  = ( 0.4 X 1 000 000 ) + 600 000                                             = 400 000 + 600 000                                             = 1 000 000

6)  ( 398 + 85 ) ÷ 23  = 483 ÷ 23                                     =  21

7)  3 269 – 1 413 ÷ 3 =  3 269 – 471                                      =  2 798

8)  ( 546 x 5 ) – ( 51 x 36 ) =  2 730 – 1 836                                              =  894

9)  ( 35 970 – 17 490 ) ÷ 33 =  18 480 ÷ 33                                                 =  560 Answer: Each school receives 560 books.

10)  ( 1 236 – 136 ) ÷ 20  x  5      = 1 100 ÷ 20  x  5      = 55  x  5      = 275 Answer: There are 275 marbles in 5 boxes.

Exercise 1 Whole Numbers

1)   Write “three million four hundred thousand and seventy-five” in numerals.

2)  State the place value of digit 8 in the number 8 341 695.

3)  Decompose 6 279 310 according to its place value.

4)  Round off  7 720 150 to the nearest millions.

5)  0.4 million + 600 000 =

6)  ( 398 + 85 ) ÷ 23 =

7)  3 269 – 1 413 ÷ 3 =

8)  ( 546 x 5 ) – ( 51 x 36 ) =

9)  There are 35 970 books printed. 17 490 of the books are spoilt. The remaining of the books are then distributed equally to 33 schools. How many books does each school receive?

10) Lily has 1 236 marbles. She gives 136 marbles to her sister. She keeps the remaining marbles in 20 small boxes. If every box contains the same number of marbles, how many marbles are there in 5 boxes?