The task involves doubling two-digit numbers by multiplying each number by 2. Let's solve the problem step by step and fill in the boxes with the correct products.
Step-by-Step Solution:
#### First Row:
1.
18 × 2
- Multiply: \( 18 \times 2 = 36 \)
- Answer:
36
2.
57 × 2
- Multiply: \( 57 \times 2 = 114 \)
- Answer:
114
3.
45 × 2
- Multiply: \( 45 \times 2 = 90 \)
- Answer:
90
4.
68 × 2
- Multiply: \( 68 \times 2 = 136 \)
- Answer:
136
#### Second Row:
1.
19 × 2
- Multiply: \( 19 \times 2 = 38 \)
- Answer:
38
2.
77 × 2
- Multiply: \( 77 \times 2 = 154 \)
- Answer:
154
3.
23 × 2
- Multiply: \( 23 \times 2 = 46 \)
- Answer:
46
4.
75 × 2
- Multiply: \( 75 \times 2 = 150 \)
- Answer:
150
#### Third Row:
1.
43 × 2
- Multiply: \( 43 \times 2 = 86 \)
- Answer:
86
2.
85 × 2
- Multiply: \( 85 \times 2 = 170 \)
- Answer:
170
3.
15 × 2
- Multiply: \( 15 \times 2 = 30 \)
- Answer:
30
4.
65 × 2
- Multiply: \( 65 \times 2 = 130 \)
- Answer:
130
#### Fourth Row:
1.
28 × 2
- Multiply: \( 28 \times 2 = 56 \)
- Answer:
56
2.
92 × 2
- Multiply: \( 92 \times 2 = 184 \)
- Answer:
184
3.
35 × 2
- Multiply: \( 35 \times 2 = 70 \)
- Answer:
70
4.
86 × 2
- Multiply: \( 86 \times 2 = 172 \)
- Answer:
172
#### Fifth Row:
1.
49 × 2
- Multiply: \( 49 \times 2 = 98 \)
- Answer:
98
2.
95 × 2
- Multiply: \( 95 \times 2 = 190 \)
- Answer:
190
3.
14 × 2
- Multiply: \( 14 \times 2 = 28 \)
- Answer:
28
4.
99 × 2
- Multiply: \( 99 \times 2 = 198 \)
- Answer:
198
Final Answer:
Here are the completed products for all the rows:
| 18 × 2 | 57 × 2 | 45 × 2 | 68 × 2 |
|---------|---------|---------|---------|
|
36 |
114 |
90 |
136 |
| 19 × 2 | 77 × 2 | 23 × 2 | 75 × 2 |
|---------|---------|---------|---------|
|
38 |
154 |
46 |
150 |
| 43 × 2 | 85 × 2 | 15 × 2 | 65 × 2 |
|---------|---------|---------|---------|
|
86 |
170 |
30 |
130 |
| 28 × 2 | 92 × 2 | 35 × 2 | 86 × 2 |
|---------|---------|---------|---------|
|
56 |
184 |
70 |
172 |
| 49 × 2 | 95 × 2 | 14 × 2 | 99 × 2 |
|---------|---------|---------|---------|
|
98 |
190 |
28 |
198 |
Thus, the final answer is:
\[
\boxed{
\begin{array}{cccc}
36 & 114 & 90 & 136 \\
38 & 154 & 46 & 150 \\
86 & 170 & 30 & 130 \\
56 & 184 & 70 & 172 \\
98 & 190 & 28 & 198 \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of primary mathematics worksheet.
