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To solve the problem , we will simplify the addition by breaking down the number 9 into two smaller numbers. Here's how we can do it step-by-step:
Step 1: Break down the number 9. We can express 9 as .
Step 2: Add 4 to 26. Starting with 26, add 4: .
Step 3: Add the remaining 5 to the result of step 2. Now, add 5 to 30: .
So, the sum of 26 and 9 is 35, which can be expressed as the equivalent expression .
Therefore, according to the given choices, the correct expression equivalent to is .
If we have 67 blocks in total, how many blocks will remain if we remove 5 tens and 4 ones?
Breaking 9 into 4 + 5 is strategic because 26 + 4 = 30, which is a friendly number! Then 30 + 5 = 35 is much easier to calculate than jumping straight to 26 + 9.
Look at the larger number first. Since 26 is close to 30, we need 4 more to reach 30. So break the smaller number (9) to include that 4: 9 = 4 + 5.
Yes! You could write 26 as , giving you . Both methods work, but breaking the smaller number is usually easier.
Start simple! First find 26 + 9 = 35 using any method you know. Then check which answer choice also equals 35 by calculating each one step by step.
You can add directly: 26 + 9. Count up from 26: 27, 28, 29, 30, 31, 32, 33, 34, 35. But decomposition helps you understand why addition works this way!
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