Mental Math Multiplication Study Guide

Select all that apply:

What number would 345 round to?

• 400

• 300

• 350

• 340

Tags

TEKS.MATH.4.2D

Find the product for

52 x 100,000

• 520

• 5,200,000

• 520,000

• 5,200

Tags

TEKS.MATH.5.3B

Find the product:

40x20

• 800

• 80

• 600

• 60

Tags

TEKS.MATH.4.4D

Find the product:

2x10⁴

• 200

• 2,000

• 20,000

• 40,000

Find the product:

30x600

• 900

• 9,000

• 18,000

• 1,800

Tags

TEKS.MATH.5.3B

Find the product:

40 x 500

• 9,000

• 2,000

• 90,000

• 20,000

Tags

TEKS.MATH.5.3B

Estimate the product:

472 x 12

• 4,000

• 5,000

• 400

• 500

Estimate the product:

38 x 361

• 16,000

• 18,000

• 1,600

• 120

What would be the best estimate for the following factors:

25 x 519

• 25 x 519

• 25 x 500

• 20 x 500

• 30 x 500

The estimated product of 690 x 879 is closest to what product?

• 600,000

• 650,000

• 60,000

• 65,000