Problem Description:
The task is to add the given pairs of two-digit numbers and write down the correct answers. Each pair consists of two numbers, and we need to perform addition for each pair.
Solution:
Let's solve each addition problem step by step:
---
####
1)
$$
\begin{array}{r}
51 \\
+ 42 \\
\hline
\end{array}
$$
- Add the ones place: \( 1 + 2 = 3 \)
- Add the tens place: \( 5 + 4 = 9 \)
- Result: \( 93 \)
Answer: \( 93 \)
---
####
2)
$$
\begin{array}{r}
37 \\
+ 42 \\
\hline
\end{array}
$$
- Add the ones place: \( 7 + 2 = 9 \)
- Add the tens place: \( 3 + 4 = 7 \)
- Result: \( 79 \)
Answer: \( 79 \)
---
####
3)
$$
\begin{array}{r}
42 \\
+ 36 \\
\hline
\end{array}
$$
- Add the ones place: \( 2 + 6 = 8 \)
- Add the tens place: \( 4 + 3 = 7 \)
- Result: \( 78 \)
Answer: \( 78 \)
---
####
4)
$$
\begin{array}{r}
52 \\
+ 34 \\
\hline
\end{array}
$$
- Add the ones place: \( 2 + 4 = 6 \)
- Add the tens place: \( 5 + 3 = 8 \)
- Result: \( 86 \)
Answer: \( 86 \)
---
####
5)
$$
\begin{array}{r}
33 \\
+ 35 \\
\hline
\end{array}
$$
- Add the ones place: \( 3 + 5 = 8 \)
- Add the tens place: \( 3 + 3 = 6 \)
- Result: \( 68 \)
Answer: \( 68 \)
---
####
6)
$$
\begin{array}{r}
27 \\
+ 62 \\
\hline
\end{array}
$$
- Add the ones place: \( 7 + 2 = 9 \)
- Add the tens place: \( 2 + 6 = 8 \)
- Result: \( 89 \)
Answer: \( 89 \)
---
####
7)
$$
\begin{array}{r}
11 \\
+ 34 \\
\hline
\end{array}
$$
- Add the ones place: \( 1 + 4 = 5 \)
- Add the tens place: \( 1 + 3 = 4 \)
- Result: \( 45 \)
Answer: \( 45 \)
---
####
8)
$$
\begin{array}{r}
67 \\
+ 12 \\
\hline
\end{array}
$$
- Add the ones place: \( 7 + 2 = 9 \)
- Add the tens place: \( 6 + 1 = 7 \)
- Result: \( 79 \)
Answer: \( 79 \)
---
####
9)
$$
\begin{array}{r}
34 \\
+ 42 \\
\hline
\end{array}
$$
- Add the ones place: \( 4 + 2 = 6 \)
- Add the tens place: \( 3 + 4 = 7 \)
- Result: \( 76 \)
Answer: \( 76 \)
---
####
10)
$$
\begin{array}{r}
23 \\
+ 45 \\
\hline
\end{array}
$$
- Add the ones place: \( 3 + 5 = 8 \)
- Add the tens place: \( 2 + 4 = 6 \)
- Result: \( 68 \)
Answer: \( 68 \)
---
####
11)
$$
\begin{array}{r}
34 \\
+ 25 \\
\hline
\end{array}
$$
- Add the ones place: \( 4 + 5 = 9 \)
- Add the tens place: \( 3 + 2 = 5 \)
- Result: \( 59 \)
Answer: \( 59 \)
---
####
12)
$$
\begin{array}{r}
42 \\
+ 31 \\
\hline
\end{array}
$$
- Add the ones place: \( 2 + 1 = 3 \)
- Add the tens place: \( 4 + 3 = 7 \)
- Result: \( 73 \)
Answer: \( 73 \)
---
Final Answers:
$$
\boxed{
\begin{array}{lll}
1) & 93 & 2) & 79 & 3) & 78 \\
4) & 86 & 5) & 68 & 6) & 89 \\
7) & 45 & 8) & 79 & 9) & 76 \\
10) & 68 & 11) & 59 & 12) & 73 \\
\end{array}
}
$$
Parent Tip: Review the logic above to help your child master the concept of mathslice worksheet.
