Question

adding 2-digit and 1-digit numbers in columns
find the sum.
1)
\

$$\begin{array}{r} 48 \\ + \\ 8 \\ \\hline \\end{array}$$

2)
\

$$\begin{array}{r} 66 \\ + \\ 6 \\ \\hline \\end{array}$$

3)
\

$$\begin{array}{r} 56 \\ + \\ 2 \\ \\hline \\end{array}$$

4)
\

$$\begin{array}{r} 77 \\ + \\ 7 \\ \\hline \\end{array}$$

5)
\

$$\begin{array}{r} 19 \\ + \\ 4 \\ \\hline \\end{array}$$

6)
\

$$\begin{array}{r} 86 \\ + \\ 5 \\ \\hline \\end{array}$$

7)
\

$$\begin{array}{r} 41 \\ + \\ 8 \\ \\hline \\end{array}$$

8)
\

$$\begin{array}{r} 97 \\ + \\ 4 \\ \\hline \\end{array}$$

9)
\

$$\begin{array}{r} 83 \\ + \\ 3 \\ \\hline \\end{array}$$

10)
\

$$\begin{array}{r} 75 \\ + \\ 2 \\ \\hline \\end{array}$$

11)
\

$$\begin{array}{r} 95 \\ + \\ 4 \\ \\hline \\end{array}$$

12)
\

$$\begin{array}{r} 36 \\ + \\ 4 \\ \\hline \\end{array}$$

13)
\

$$\begin{array}{r} 91 \\ + \\ 6 \\ \\hline \\end{array}$$

14)
\

$$\begin{array}{r} 50 \\ + \\ 7 \\ \\hline \\end{array}$$

15)
\

$$\begin{array}{r} 36 \\ + \\ 5 \\ \\hline \\end{array}$$

16)
\

$$\begin{array}{r} 51 \\ + \\ 4 \\ \\hline \\end{array}$$

17)
\

$$\begin{array}{r} 17 \\ + \\ 5 \\ \\hline \\end{array}$$

18)
\

$$\begin{array}{r} 91 \\ + \\ 2 \\ \\hline \\end{array}$$

19)
\

$$\begin{array}{r} 93 \\ + \\ 3 \\ \\hline 96 \\end{array}$$

20)
\

$$\begin{array}{r} 92 \\ + \\ 5 \\ \\hline \\end{array}$$

Explanation:

1)

Step1: Add the ones place: \(8 + 8 = 16\), write down 6, carry over 1.

Step2: Add the tens place with carry: \(4 + 0 + 1 = 5\).

Step1: Add ones: \(6 + 6 = 12\), write 2, carry 1.

Step2: Add tens with carry: \(6 + 0 + 1 = 7\).

Step1: Add ones: \(6 + 2 = 8\).

Step2: Add tens: \(5 + 0 = 5\).

Answer:

\(56\)

2)