Assess Reasonableness of Products Using Decimals

Multiply.

12 x 0.3 = ________

Multiply.

1.2 x 1.1 = ________

5.12345 x 6.1345 = about 3

• Reasonable

• Not reasonable

Javier uses estimation to check the product for 7.24 x 3.9. Which of the following is a reasonable estimate for the product?

• 700 x 40 = 28,000

• 700 x 3 = 2,100

• 7 x 4 = 28

• 70 x 40 = 2,800

This bag of Hot Cheetos costs $2.98. ABOUT how much would you have to pay for 30 bags?

• $120

• $60

• $900

• $90

Estimate 8.5 × 0.61

• 0.052

• 5.185

• 51.850

• 518.500

Arnold is solving this multiplication problem: 8.12 × 4.7. Which of these estimates can Arnold use to help him determine where the decimal point belongs in the product?

• 80 × 40 = 3,200

• 8 × 5 = 40

• 800 × 4 = 3,200

• 800 × 5 = 4,000

Estimate the product.

23.2 × 41 ≈

• 800

• 900

• 1000

• 1200

If the XBOX Series X console retails for $499.99, ABOUT how much would it cost to purchase 5 consoles?

• $2,500

• $250

• $2,000

• $3,000