Question
Carlos has 38 toys in his toy box. His brother gives him 32 more toys. For his birthday, Carlos receives 20 more toys. Which shows one way to find the sum of his toys? A. \( 30+30+20=80 \), then \( 80+(8+2+0) \), then \( 80-10= \) B. \( 30+30+20=80 \), then \( 80+(8+2+0) \), then \( 80+10= \)
Ask by Cross Welch. in the United States
Mar 15,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
One way to find the sum is to add the tens and ones separately: \(30 + 30 + 20 = 80\) and \(8 + 2 + 0 = 10\), then add them together: \(80 + 10 = 90\). So, the correct choice is B.
Solution
We start with the three amounts:
- Carlos has \(38\) toys.
- His brother gives him \(32\) toys.
- He receives \(20\) toys for his birthday.
One way to add these is to break each number into tens and ones.
1. Write the numbers as:
- \(38 = 30 + 8\)
- \(32 = 30 + 2\)
- \(20 = 20 + 0\)
2. Sum the tens:
\[
30 + 30 + 20 = 80
\]
3. Sum the ones:
\[
8 + 2 + 0 = 10
\]
4. Combine the sums:
\[
80 + 10 = 90
\]
Comparing with the given choices:
- Option A shows \(80 - 10\), which would be incorrect.
- Option B shows \(80 + 10\), which matches our process.
Thus, the correct method is shown in option B.
Answered by UpStudy AI and reviewed by a Professional Tutor
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Simplify this solution Beyond the Answer
To find the sum of Carlos's toys, we can add them up step-by-step. Starting with his original 38 toys, adding the 32 from his brother brings the total to 70. After receiving 20 more for his birthday, the sum becomes 90. So if you need a clear way to track these numbers, think of it like this: simply add as you go for clarity! When tackling addition problems, keep an eye out for simple mistakes like miscalculating smaller sums or carrying over numbers incorrectly. Instead of breaking numbers apart into confusing chunks, add them in manageable parts, like tens first, and then adjust for any leftover ones—this can save you from puzzling errors and miscalculations!
