Estimate first: is this answer sensible?

Answer Key - Grade 6 Math Worksheet - Challenge Me

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

1. 1.

   Bo's bike trip of 27.6 km takes 3.7 hours, snack stops included. Rounding each to the nearest whole, about what is 27.6 ÷ 3.7?

   7
2. 2.

   Esme has 44.8 m of fabric and cuts pieces 4.6 m long for costumes. Rounding each to the nearest whole, about what is 44.8 ÷ 4.6?

   9
3. 3.

   Jun estimates 4.8 × 6.7 as 5 × 7 = 35. Is 35 an overestimate or an underestimate?

   • Overestimate: both rounded up
   • Exact: no rounding happened
   • Underestimate: both rounded up
4. 4.

   Kira estimates 3.2 + 5.1 as 3 + 5 = 8. Is 8 an overestimate or an underestimate?

   • Underestimate: both rounded down
   • Exact: the sum is 8
   • Overestimate: both rounded down
5. 5.

   Luz has $10 and wants 4 snacks at $2.35. Why round each price up to $2.50 to check?

   • To make the $2.35 cheaper
   • To see if $10 is enough
   • To find the exact $9.40
6. 6.

   Milo says 3.2 × 4.1 = 131.2. Agree or disagree?

   • Agree: the digits 1312 are right
   • Agree: products grow big
   • Disagree: it is about 12
7. 7.

   Noah says 0.5 × 8.4 = 42. Agree or disagree?

   • Disagree: it is about 4
   • Agree: multiplying makes it bigger
   • Agree: 5 × 84 makes 420
8. 8.

   Pia says 5/6 + 7/8 is less than 1. Agree or disagree?

   • Agree: 5 + 7 over 6 + 8 is 12/14
   • Disagree: it is close to 2
   • Agree: the fractions are small
9. 9.

   Tala gets the digits 30 for 9.6 ÷ 0.32. Which answer fits the estimate?

   • 0.3
   • 30
   • 3
10. 10.

    Zee's answer for 6.25 × 3.9 has the digits 24375. Which fits the estimate?

    • 2.4375
    • 24.375
    • 243.75