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Study with Ghada› Math Fourth Grade, Primary› Unit 2

Lesson ⁦2-4⁩: Addition

Math · Fourth Grade, Primary · Unit 2: Addition and Subtraction · First Semester

A 10-question quiz; after every question you'll see the right answer with an explanation.
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What will you learn in this lesson?

In this lesson we add multi-digit numbers with regrouping, which means moving anything over 9 in one place to the next place. This skill is essential for everyday calculations.

  • Adds numbers with three or more digits with regrouping
  • Lines up numbers vertically with the places aligned
  • Checks a sum by estimating or by subtracting
  • Solves addition word problems

💡 Tip: Always start adding from the ones place on the right, and write the carried digit small above the next place so you don't forget it.

🤖 Ask Ghada about the lesson

Ghada explains the lesson and answers your questions about it. Log in to get started.

Worked examples from the Addition lesson questions

What is 3,456 + 2,321?
  • 5,777
  • 5,767
  • 5,877
  • 1,135
✓ 5,777
We add place by place: 6 + 1 = 7, 5 + 2 = 7, 4 + 3 = 7, 3 + 2 = 5, so the answer is 5,777.
What is 2,500 + 0 + 1,500?
  • 4,000
  • 3,000
  • 1,000
  • 4,500
✓ 4,000
Adding zero does not change the result: 2,500 + 1,500 = 4,000.
Show more examples (3)
What is 4,568 + 2,795?
  • 7,363
  • 6,363
  • 7,263
  • 7,373
✓ 7,363
8 + 5 = 13 (write 3, carry 1), 6 + 9 + 1 = 16 (write 6, carry 1), 5 + 7 + 1 = 13 (write 3, carry 1), 4 + 2 + 1 = 7, so the answer is 7,363.
What is 25,708 + 14,596?
  • 40,304
  • 39,304
  • 40,204
  • 30,204
✓ 40,304
8 + 6 = 14, 0 + 9 + 1 = 10, 7 + 5 + 1 = 13, 5 + 4 + 1 = 10, 2 + 1 + 1 = 4, so the answer is 40,304.
A store in Al-Ahsa sold 1,875 kilograms of dates in the first week and 2,948 kilograms in the second week. How many kilograms did it sell in the two weeks?
  • 4,823
  • 3,723
  • 4,813
  • 4,723
✓ 4,823
1,875 + 2,948: 5 + 8 = 13, 7 + 4 + 1 = 12, 8 + 9 + 1 = 18, 1 + 2 + 1 = 4, so the answer is 4,823 kilograms.

FAQ about the Addition lesson

What does regrouping mean in addition?

If the sum in a place is 10 or more, we write the ones and carry the ten to the next place. Example: 7 + 5 = 12 in the ones place, so we write 2 and carry 1 to the tens.

How do I check a sum?

I subtract one of the two numbers from the sum and the other number should appear, or I estimate the sum and compare.

How do I study the lesson Addition and test myself on it?

Start the lesson quiz on Study with Ghada: 10 questions from the Math Fourth Grade, Primary question bank. After each answer you'll see the right answer with an explanation, and any questions you miss move to “Review my mistakes” until you master them.

Are Study with Ghada quizzes free and aligned with the curriculum?

Yes, completely free. They're built on the Math - Grade 4 - Semester 1 lessons in the same order as the book, and every question is reviewed and approved by a teacher before students see it.

Unit 2 lessons: Addition and Subtraction

⁦2-1⁩ Algebra: Addition Properties and Subtraction Rules ⁦2-2⁩ Estimate Sums and Differences ⁦2-3⁩ Problem-Solving Skill: Estimate or Find an Exact Answer ⁦2-5⁩ Subtraction ⁦2-6⁩ Subtraction with Zeros All Math Fourth Grade, Primary lessons →
← ⁦2-3⁩ Problem-Solving Skill: Estimate or Find an Exact Answer ⁦2-5⁩ Subtraction →