Arithmetic Operations and Word Problems

This video tutorial covers adding and subtracting decimals with few non-zero digits. It includes examples using base 10 diagrams, addresses common misconceptions, and demonstrates correct calculation methods. The tutorial also explores cost estimation, volume calculation, and speed-distance problems, providing a comprehensive understanding of decimal operations.

What is the result of subtracting 46 hundredths from 1.13 using a base 10 diagram?

• 0.87

• 0.67

• 0.57

• 0.77

How do you compute the sum of 27 thousandths and 4 thousandths?

• 0.027

• 0.031

• 0.041

• 0.037

Which of the following is the correct sum of 1.2 and 0.145?

• 1.345

• 1.245

• 1.445

• 1.145

Why is it possible to subtract 1.97 from 20?

• Because 20 is larger than 1.97

• Because 1.97 has fewer digits

• Because 20 is a whole number

• Because 1.97 is a decimal

What is the correct way to find the difference between 3 tenths and 6 thousandths?

• 0.294

• 0.300

• 0.306

• 0.294

If Elena wants to buy 3 pencils, a hat, and 2 binders, will her total cost be under $20?

• Depends on discounts

• Exactly $20

• Yes, it will be under $20

• No, it will be over $20

How many pencils can Elena buy with $5 if each costs 30 cents?

• 16 pencils

• 18 pencils

• 15 pencils

• 17 pencils

How many half-centimeter cubes fit into a rectangular prism measuring 7.5 cm by 12 cm by 15.5 cm?

• 11,160 cubes

• 10,000 cubes

• 12,000 cubes

• 9,000 cubes

What is the volume of a rectangular prism with dimensions 7.5 cm, 12 cm, and 15.5 cm?

• 1395 cm³

• 1500 cm³

• 1300 cm³

• 1400 cm³

How far does a car travel in 18 minutes if it travels 75 miles in 60 minutes?

• 20 miles

• 30 miles

• 25 miles

• 22.5 miles