Precision and greatest possible error in a measurement

Answer Key - Grade 9 Math Worksheet - Challenge Me

Circle the best answer, or write your answer on the line.

1. 1.

   Kira measures a book cover as 24 cm by 18 cm, each to the nearest cm. What are the smallest and largest its area could be, in square cm, smallest first?

   411.25, 453.25
2. 2.

   Luz measures a magnet as 6 cm by 4 cm, each to the nearest cm. What are the smallest and largest its area could be, in square cm, smallest first?

   19.25, 29.25
3. 3.

   Pia measures a toy block and gets an edge of 3 cm, to the nearest cm. What is the largest its volume could be, in cubic cm?

   42.875
4. 4.

   Ren measures a small box and gets an edge of 4 cm, to the nearest cm. What is the largest its volume could be, in cubic cm?

   91.125
5. 5.

   Tala measures a game cube and gets an edge of 5 cm, to the nearest cm. What is the largest its volume could be, in cubic cm?

   166.375
6. 6.

   Zee measures a sponge cube and gets an edge of 6 cm, to the nearest cm. What is the largest its volume could be, in cubic cm?

   274.625
7. 7.

   Ari measures a scarf with a ruler as 40 cm, to the nearest cm. What percent of 40 cm is the greatest possible error?

   1.25
8. 8.

   Bo measures a kite with a ruler as 50 cm, to the nearest cm. What percent of 50 cm is the greatest possible error?

   1
9. 9.

   Esme measures a book with a ruler as 25 cm, to the nearest cm. What percent of 25 cm is the greatest possible error?

   2
10. 10.

    Jun measures a pencil with a ruler as 20 cm, to the nearest cm. What percent of 20 cm is the greatest possible error?

    2.5