When we want to get a value that is close but not necessarily exact, we can use an approximation. One method to approximate a number is known as rounding. Rounding allows us to approximate a number to a specific round off place.
Test Objectives:•Demonstrate the ability to round a whole number to the nearest ten, hundred, & thousand
•Demonstrate the ability to round a whole number to the nearest thousand, ten thousand, & million
•Demonstrate the ability to round a whole number to any high level place
Rounding Whole Numbers Test:
#1:
Instructions: Round each to the nearest ten, hundred, and thousand.
a) 15,375
b) 373,575
c) 21,583
#2:
Instructions: Round each to the nearest thousand and ten thousand.
a) 5,273,371
b) 65,315
c) 26,300
#3:
Instructions: Round each to the nearest million.
a) 6,375,322
b) 17,955,971
c) 19,100,571
#4:
Instructions: Round each to the nearest billion.
a) 163,517,325,317
b) 224,978,381,500
c) 6,000,000,536,179
#5:
Instructions: Round each to the nearest ten trillions.
a) 169,315,111,827,059
b) 5,978,181,246,056,192
Written Solutions:
Solution:
a) nearest ten - 15,380 : nearest hundred - 15,400 : nearest thousand - 15,000
b) nearest ten - 373,580 : nearest hundred - 373,600 : nearest thousand - 374,000
c) nearest ten - 21,580 : nearest hundred - 21,600 : nearest thousand - 22,000
Solution:
a) nearest thousand - 5,273,000 : nearest ten thousand - 5,270,000
b) nearest thousand - 65,000 : nearest ten thousand - 70,000
c) nearest thousand - 26,000 : nearest ten thousand - 30,000
Solution:
a) 6,000,000
b) 18,000,000
c) 19,000,000
Solution:
a) 164,000,000,000
b) 225,000,000,000
c) 6,000,000,000,000
Solution:
a) 170,000,000,000,000
b) 5,980,000,000,000,000