This document contains instructions and examples for multiplying two, three, and four digit numbers by 11 using a method of placing the digits in columns and adding corresponding columns. It includes: 1. The names of three students in a group learning this method. 2. Examples of multiplying two digit numbers by 11, showing the setup and calculations. 3. Examples of multiplying three digit numbers by 11 using the same method. 4. An example of multiplying a four digit number by 11.

1. RAPIDLY MULTIPLY
BY 11S
GROUP 3
1. RIZKY TITIE R. (110210101029)
2. SHOFIA HIDAYAH (110210101036)
3. MARLIA SARI P. (110210101087)

2. MULTIPLY 2 DIGITS BY 11S
Example 1:
35 x 11 3_5
3+5=8
385

3. Example 2:
88 x 11 8_8
8+8=16
8168

4. 88 x 11 8_8
8+8=16
8168
968

5. MULTIPLY 3 DIGITS BY 11S
Example 1:
127 x 11 1_7
1+2=3
2+7=9
1397

6. Example 2:
619 x 11 6_9
6+1=7
1+9=10
67109

7. 619 x 11 67109
6+1=7
1+9=10
6809
7+1=8

8. Soal:
342 x 11 3_2
3+4=7
4+2=6
3762

9. MULTIPLY 4 DIGIT BY 11S
Example 1:
1234 x 11 1_4
1+2=3
2+3=5
3+4=7
13574