Estimating and Modeling Decimal Sums and Differences

What is a reasonable estimate for the equation 1.92-1.39?

• 0.001

• 1.234

• 0.53

• 4.00

What is a reasonable estimate of the difference between 0.73 and 0.45?

• 0.25

• 3.00

• 0.92

• 2.00

What is a reasonable estimate for the equation 11.4-4.9?

• 3.8

• 6.00

• 0.002

• 16.00

What is a reasonable estimate of the sum of 5.7 and 2.32?

• 2.5

• 14.00

• 0.24

• 8.00

Keegan had $11 after he left the candy store. If he bought candy for $6.39, ABOUT how much money did he have before he went into the store?

• $17

• $14.9

• $8.23

• $4.13

Which equation matches the model?

• 0.73 - 0.23 = 0.50

• 0.50 + 0.23 = 0.73

• 0.73 + 0.23 = 0.50

• 0.73 - 0.50 = 0.23

On Monday, Coach Grissom drove 1.4 miles to school. After school he drove 2.87 miles to the park, 4.9 miles to the grocery store, and 7.12 miles back home. Round each driving distance to the nearest mile to estimate the number of miles Coach Grissom drove on Monday.

• About 18 miles

• About 11 miles

• About 16 miles

• About 14 miles

Ms. Chaney had $565.26 in her bank account. She spent $78.95 at TJ Maxx. Estimate how much money Ms. Chaney has left in her bank account.

• 486.31

• $500

• $490

• $480