Operations on decimal numbers

Danielle has $17.95. Raj has $6.35. Which equation shows the best way to estimate the money they have together?

• $18.00 + $7.00

• $18.00 + $6.00

• $17.00 + $7.00

• $17.00 + $6.00

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

Estimate the sum.

79.7 + 32.3 =

• 110

• 112

• 200

• 150

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

Which of the following is the best estimate for the equation:

70.2-59.7

• 25

• 10

• 3

• 19

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

Round to the nearest ones and then add.

3.872 + 2.409

• 5

• 7

• 6

• 4

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

Is 900 a reasonable estimate for the sum of 232 + 501?

• Yes

• No

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

Estimate to the nearest WHOLE number and solve:

44.56 - 14.72

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

Estimate the difference by rounding each decimal to the nearest hundred.

376.8 - 109.5

• 100

• 200

• 300

• 400

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

Which of the following is the best estimate for the equation:

61.44 + 88.3

• 100

• 120

• 150

• 180

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

What does it mean to estimate?

• To find an exact answer.

• To find a "close to" answer.

• To put together like terms.

• To round your answer.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

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

• 3.8

• 6.00

• 0.002

• 16.00

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7