Free Printable Worksheets for 5th Graders Kids Online - Free Printable

To solve these problems, we can use a simple trick for multiplying by 20.

The Trick:
Multiplying by 20 is the same as multiplying by 2 and then adding a zero at the end.
1. Multiply the number by 2.
2. Write a 0 after that answer.

Let's go through them step-by-step:

Left Column:
1. 49 × 20: First, $49 \times 2 = 98$. Add a 0 $\rightarrow$ 980
2. 46 × 20: First, $46 \times 2 = 92$. Add a 0 $\rightarrow$ 920
3. 85 × 20: First, $85 \times 2 = 170$. Add a 0 $\rightarrow$ 1700
4. 94 × 20: First, $94 \times 2 = 188$. Add a 0 $\rightarrow$ 1880
5. 52 × 20: First, $52 \times 2 = 104$. Add a 0 $\rightarrow$ 1040
6. 68 × 20: First, $68 \times 2 = 136$. Add a 0 $\rightarrow$ 1360
7. 41 × 20: First, $41 \times 2 = 82$. Add a 0 $\rightarrow$ 820
8. 95 × 20: First, $95 \times 2 = 190$. Add a 0 $\rightarrow$ 1900

Right Column:
9. 65 × 20: First, $65 \times 2 = 130$. Add a 0 $\rightarrow$ 1300
10. 40 × 20: First, $4 \times 2 = 8$. Since there are two zeros total (one from 40, one from 20), add two zeros $\rightarrow$ 800
11. 74 × 20: First, $74 \times 2 = 148$. Add a 0 $\rightarrow$ 1480
12. 39 × 20: First, $39 \times 2 = 78$. Add a 0 $\rightarrow$ 780
13. 72 × 20: First, $72 \times 2 = 144$. Add a 0 $\rightarrow$ 1440
14. 60 × 20: First, $6 \times 2 = 12$. Add two zeros $\rightarrow$ 1200
15. 29 × 20: First, $29 \times 2 = 58$. Add a 0 $\rightarrow$ 580
16. 47 × 20: First, $47 \times 2 = 94$. Add a 0 $\rightarrow$ 940

Final Answer:
49 × 20 = 980
46 × 20 = 920
85 × 20 = 1700
94 × 20 = 1880
52 × 20 = 1040
68 × 20 = 1360
41 × 20 = 820
95 × 20 = 1900

65 × 20 = 1300
40 × 20 = 800
74 × 20 = 1480
39 × 20 = 780
72 × 20 = 1440
60 × 20 = 1200
29 × 20 = 580
47 × 20 = 940