Mathematics Grade 8 15 min

Add and subtract rational numbers: word problems

Add and subtract rational numbers: word problems

What you'll learn

  • Identify key words and phrases (such as 'sum', 'difference', 'product', 'quotient', 'is equal to') within word problems that indicate specific mathematical operations with 80% accuracy.
  • Translate simple one-step word problems into algebraic equations using variables to represent unknown quantities with 75% accuracy.
  • Write algebraic equations from given word problems, demonstrating the correct placement of operators and variables, and verify the equation matches the problem's context in at least 3 out of 4 examples.

Tutorial Preview

1

A recipe needs 1/2 cup of flour and 1/4 cup of sugar. How much is that in total?

2

A board is 5 1/2 feet long. You cut off 2 1/4 feet. How much is left?

3

Your account has $50.25. You deposit $10.50, then withdraw $20.00. What's the new balance?

Sample Practice Questions

Easy
Leo ate 1/8 of a pizza and Mia ate 3/8. What fraction did they eat together?
0.1/2
1.1/4
2.3/8
3.5/8
Easy
A plant was 4.5 inches tall. It grew 1.2 inches. How tall is it now?
0.5.7 in
1.5.5 in
2.5.2 in
3.3.3 in
Easy
A rope is 10 1/2 feet long. You cut 3 feet off. How much is left?
0.7 ft
1.7 1/2 ft
2.8 ft
3.8 1/2 ft

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Frequently asked questions

What grade level is "Add and subtract rational numbers: word problems"?

Add and subtract rational numbers: word problems is a Grade 8 Mathematics lesson on ExcelOS.

What will I learn in Add and subtract rational numbers: word problems?

You'll be able to: Identify key words and phrases (such as 'sum', 'difference', 'product', 'quotient', 'is equal to') within word problems that indicate specific mathematical operations with 80% accuracy; Translate simple one-step word problems….

Is "Add and subtract rational numbers: word problems" free to practice?

Yes. You can read the tutorial preview for free, and signing up for a free ExcelOS account unlocks the full tutorial and all practice questions with instant feedback.

How many practice questions are included with Add and subtract rational numbers: word problems?

This lesson includes 25 practice questions across multiple difficulty levels, each with instant feedback and explanations.

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