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​​Approximation: Quiz 3 - Answers
Part 1
1)
a) 20.5
b) 90.8
c) 17
d) 108.2
 
2)
a) 689
b) 191
c) 34
d) 904
 
3)
a) 200,600
b) 78,200
c) 400
d) 12,000
 
4)
a) 0.829
b) 12.241
c) 50.34
d) 18.992
 
Part 2
1)
a) 503
b) 30,200
c) 0.000231
d) 3
e) 6,970,000
 
2)
a) 470
b) 22
c) 68,000,000
d) 0.0072
e) 2,800
 
3)
a) 2,000
b) 1
c) 900
d) 90,000,000
e) 0.00006
 
4)
a) 25.3
b) 19,230
c) 0.0007283
d) 98,020,000
e) 29,380
 
Part 3
1) 20.5
2) 90
3) 103.62
4) 0.003
5) 0.8239
6) 80.2
Working
Questions
Part 1 
1) Truncate the following numbers to one decimal place:
a) 20.54
b) 90.89
c) 17.042
d) 108.2873
 
2) Truncate the following numbers to the units:
a) 689.2
b) 191.7
c) 34.8271
d) 904.06
 
3) Truncate the following numbers to the hundreds:
a) 200,671
b) 78,231
c) 402.53
d) 12,034
 
4) Truncate the following numbers to 3 decimal places:
a) 0.82931
b) 12.241521
c) 50.340023
d) 18.9921
Part 2 
1) Truncate the following numbers to 3 significant figures:
a) 503.243
b) 30,293
c) 0.00023152
d) 3.00281
e) 6,973,231
 
2) Truncate the following numbers to 2 significant figures:
a) 479.24
b) 22.23
c) 68,987,323
d) 0.007281
e) 2,891
 
3) Truncate the following numbers to 1 significant figure:
a) 2,152.302
b) 1.231
c) 983
d) 98,023,152
e) 0.000067212
 
4) Truncate the following numbers to 4 significant figures:
a) 25.302
b) 19,231
c) 0.00072837
d) 98,023,152
e) 29,381.23
Part 3
1) Truncate 20.54 to one decimal place
2) Truncate 90.89 to one significant figure
3) Truncate 103.625 to two decimal places
4) Truncate 0.00341 to 1 significant figure
5) Truncate 0.823914 to 4 decimal places
6) Truncate 80.273 to 3 significant figures