40+40

Here is a clear, step-by-step solution in English for a 3rd-grade student. Problem: 40 + 40 Step 1: Recognize the operation - This is addition: we are putting two numbers together. Step 2: Use place value - 40 is made of 4 tens (4 x 10). - So 40 + 40 = (4 tens) + (4 tens). Step 3: Add the tens - 4 tens + 4 tens = 8 tens. Step 4: Convert back to a number - 8 tens equals 80. Step 5: Check your answer - 40 + 40 = 80. You can also think: 4 + 4 = 8, and keep the zero from the tens place, giving 80. Final answer: 80 Quick tips: - You can double the number: 40 + 40 is the same as 2 × 40 = 80. - If you prefer, use a number line: start at 40 and jump 40 more to land on 80.