Problem Description:
The task involves solving a series of multiplication problems where a 2-digit number is multiplied by a 1-digit number (specifically, 9). The goal is to compute each product accurately.
Solution Approach:
To solve each multiplication problem, we will multiply the given 2-digit number by 9. Here are the steps for each calculation:
#### First Row:
1.
14 × 9:
\[
14 \times 9 = 126
\]
2.
28 × 9:
\[
28 \times 9 = 252
\]
3.
17 × 9:
\[
17 \times 9 = 153
\]
4.
89 × 9:
\[
89 \times 9 = 801
\]
5.
12 × 9:
\[
12 \times 9 = 108
\]
#### Second Row:
6.
35 × 9:
\[
35 \times 9 = 315
\]
7.
39 × 9:
\[
39 \times 9 = 351
\]
8.
67 × 9:
\[
67 \times 9 = 603
\]
9.
18 × 9:
\[
18 \times 9 = 162
\]
10.
33 × 9:
\[
33 \times 9 = 297
\]
#### Third Row:
11.
23 × 9:
\[
23 \times 9 = 207
\]
12.
51 × 9:
\[
51 \times 9 = 459
\]
13.
45 × 9:
\[
45 \times 9 = 405
\]
14.
70 × 9:
\[
70 \times 9 = 630
\]
15.
70 × 9:
\[
70 \times 9 = 630
\]
#### Fourth Row:
16.
84 × 9:
\[
84 \times 9 = 756
\]
17.
22 × 9:
\[
22 \times 9 = 198
\]
18.
76 × 9:
\[
76 \times 9 = 684
\]
19.
61 × 9:
\[
61 \times 9 = 549
\]
20.
80 × 9:
\[
80 \times 9 = 720
\]
#### Fifth Row:
21.
87 × 9:
\[
87 \times 9 = 783
\]
22.
25 × 9:
\[
25 \times 9 = 225
\]
23.
70 × 9:
\[
70 \times 9 = 630
\]
24.
28 × 9:
\[
28 \times 9 = 252
\]
25.
86 × 9:
\[
86 \times 9 = 774
\]
Final Answers:
\[
\boxed{
\begin{array}{ccccc}
126 & 252 & 153 & 801 & 108 \\
315 & 351 & 603 & 162 & 297 \\
207 & 459 & 405 & 630 & 630 \\
756 & 198 & 684 & 549 & 720 \\
783 & 225 & 630 & 252 & 774 \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of multiplication worksheets 2 digit by 1 digit.
