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.

   Ari's class collects 35.6 kg of paper for recycling in 5.8 weeks. Rounding each to the nearest whole, about what is 35.6 ÷ 5.8?

   6
2. 2.

   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
3. 3.

   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
4. 4.

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

   • Overestimate: both rounded up
   • Underestimate: both rounded up
   • Exact: no rounding happened
5. 5.

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

   • Overestimate: both rounded down
   • Underestimate: both rounded down
   • Exact: the sum is 8
6. 6.

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

   • To find the exact $9.40
   • To see if $10 is enough
   • To make the $2.35 cheaper
7. 7.

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

   • Disagree: it is about 12
   • Agree: the digits 1312 are right
   • Agree: products grow big
8. 8.

   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
9. 9.

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

   • Agree: the fractions are small
   • Disagree: it is close to 2
   • Agree: 5 + 7 over 6 + 8 is 12/14
10. 10.

    Ren's calculator shows the digits 450 for 2.5 × 1.8, but the decimal point is missing. Where does it go?

    • 0.450
    • 45.0
    • 4.50