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.

   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
2. 2.

   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
3. 3.

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

   • Exact: the sum is 8
   • Underestimate: both rounded down
   • Overestimate: both rounded down
4. 4.

   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
5. 5.

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

   • Agree: products grow big
   • Disagree: it is about 12
   • Agree: the digits 1312 are right
6. 6.

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

   • Agree: 5 × 84 makes 420
   • Disagree: it is about 4
   • Agree: multiplying makes it bigger
7. 7.

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

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

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

   • 4.50
   • 45.0
   • 0.450
9. 9.

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

   • 3
   • 30
   • 0.3
10. 10.

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

    • 2.4375
    • 24.375
    • 243.75