4. lesson 3 addition of whole numbers
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This document discusses addition of whole numbers. It defines addition as bringing two or more numbers together to make a new total sum. The addends are the numbers being added and the plus sign is the addition symbol. When adding, digits are added from right to left and carrying is used when the sum is greater than 9. Word problems can be solved using the ESA method which stands for writing the Equation, finding the Solution, and stating the Answer. Key words that indicate addition is needed include add, altogether, both, more than, in all, plus, sum, total, combined, and join.
4. lesson 3 addition of whole numbers
- 1. By John Rome Aranas ADDITION OF WHOLE NUMBERS
- 2. ADDITION It is bringing of two or more numbers (or things) together to make a new total What is Addition?
- 3. Parts of Addition Equation 1,662 + 1,952 2,614 Addends – these are the numbers added together Sum – the answer in an addition equation Plus – addition sy mbol
- 4. Example 495 + 372= N 495 + 372 867 STEPS 1) Start adding from the ONES digits 2) If the answer is 10 or above, retain the ONES digit and carry the TENS on e on to the next digits to be added. 3) Repeat the process to the last digits to be added. 1
- 5. More Examples Let’s try these! 3,482 + 2,948 = 𝑁 382,478 + 73,902 = 𝑁 723,294,370 + 27,492,004 = 𝑁
- 6. Word Problems In basic operations, solving word problems requires a systematic way of answering. In such case, we use the ESA Method.
- 7. ESA Method ESA stands for: E – Equation S – Solution A – Answer
- 8. E – Equation This stands for the equation needed to help us solve the problem
- 9. S – Solution This is the actual way of solving the problem by using the necessary operation/s.
- 10. A – Answer This is the answer to the problem.
- 11. Steps 1) Read and understand the problem carefully. 2) Identify the operation/s needed to solve the problem. 3) Solve the problem by using ESA Method.
- 12. To identify the operation needed, we need to look for key words: For addition: Add Entire cost Altogether Increased by Both More/ More than In all Plus Sum Total cost/ Total Combined Join
- 13. Example Rigo bought a pair of shoes for 3,599 pesos. He also bought a shirt for 747 pesos, and a cap for 569 pesos. What is the total cost of the things he bought?
- 14. ESA Method E: 3,599 + 747 + 569 = 𝑁 S: 3,599 747 + 569 4,915 221 A: 4,915 pesos
- 15. Example Mang Anton harvested 7,554 mangoes in his orchard while Mang Lance harvested 8,934. What is the total number of mangoes both harvested?
- 16. ESA Method E: 7,554 + 8,934 = 𝑁 S: 7,554 + 8,934 16,488 1 A: 16,488 mangoes
- 17. Try this! In three days, Vito was able to write 3,562 words, 4,281 words, and 983 words respectively for his upcoming novel. What is the number of words written altogether?