Class VI T4

 

1.         A chopper (helicopter) takes 1hour 30 minutes from Paro to Bumthang. A car rides between two dzongkhag will take 8 hours 30 minutes. The distance between two dzongkhag is 127 km. 

 a. What rate describes the speed of the helicopter and the car?

 b.     Which is faster? How do you know?

2.Use the place value chart and write the following number in standard form.                            

 

i.          4.55 billions

ii.         6.15 ten millions iii.           763 ten thousands

3. Nima has written 640,047,006 in expanded form as given below.                                               640,047,006 = 600,000,000 + 4,000, 000 + 40,000 + 7,000 + 6

 

Has she written it correctly? Give a reason to support your answer.

4.What is the differences between prime numbers and composite numbers? List down at least 4 numbers each.