Foundation Mathematics Primary 3 Addition and Subtraction

What is 345 + 278?

A 623
B 513
C 613
D 523
Show Worked Solution

Worked Solution

Step 1: Add the ones digits: 5 + 8 = 13. Write 3, carry 1. Step 2: Add the tens digits: 4 + 7 + 1 (carried) = 12. Write 2, carry 1. Step 3: Add the hundreds digits: 3 + 2 + 1 (carried) = 6. Answer: 623

Correct answer: 623

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