Place Value and Approximation

Round off 7279 to the nearest 100.

• 7000

• 7300

• 7200

• 7280

Round off 10.4952 to 2 decimal places.

• 10

• 10.49

• 10.50

• 10.5

Round 16.38 to 1 significant figure.

• 16

• 16.3

• 20

• 10

Round 0.002749 to 3 significant figures.

• 0.002

• 0.00274

• 0.00275

• 0.00

Round off 404 601 to 2 signifiant figures.

• 40

• 400 000

• 404 000

• 404

Estimate 2315 + 5976 by rounding each number to 1 significant figure.

• 2000 + 5000

• 2000 + 6000

• 2 + 6

• 2 + 5

Evaluate 2315 + 5476 and round off the answer to 1 significant figures.

• 8291

• 8300

• 8000

• 7000

Round 143 to the nearest ten

• 100
• 130
• 140
• 150

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

What is the best estimate for the height of the tree?

• 1 km

• 3 m

• 30 cm

• 150 mm

What item would have a length of about 2 meter?

• a flag pole

• a door

• a TV set

• a textbook