Jarimatika: A Fun Way to Learn Multiplication and Division
Jarimatika is a method of learning arithmetic by using fingers as a tool. The word jarimatika comes from the combination of jari (finger) and matematika (mathematics). Jarimatika was developed by Septi Peni Wulandani, an Indonesian educator who wrote a book titled Jarimatika Perkalian dan Pembagian (Jarimatika Multiplication and Division) in 2014.
jarimatika perkalian dan pembagian septi peni wulandani pdf 59
The book explains how to use finger movements to perform multiplication and division operations up to two digits. The book also provides exercises and games to practice jarimatika skills. Jarimatika is intended for children aged 5 to 12 years old, but it can also be used by adults who want to improve their mental arithmetic abilities.
Jarimatika is based on the concept of decimal system, which uses ten symbols (0 to 9) to represent numbers. Each finger represents one symbol, and the position of the finger indicates the value of the symbol. For example, a straight finger means 1, a bent finger means 5, and a closed fist means 0. By using different combinations of fingers, one can form any number from 0 to 99.
To perform multiplication and division operations, jarimatika uses four basic rules: addition, subtraction, doubling, and halving. These rules are applied to the digits of the numbers involved in the operation. For example, to multiply 12 by 13, one can use the following steps:
Write down the numbers in a column:
Add the digits in the same place:
1 + 1 = 2
2 + 3 = 5
Double the result of step 2:
2 x 2 = 4
5 x 2 = 10
Subtract the digits in different places:
1 - 3 = -2
2 - 1 = 1
Halve the result of step 4:
-2 / 2 = -1
1 / 2 = 0.5
Combine the results of step 3 and step 5:
4 - 1 = 3
10 + 0.5 = 10.5
Write down the final answer:
12 x 13 = 156
To perform jarimatika operations using fingers, one can follow these steps:
Assign each finger a symbol from 0 to 9 according to its position.
Form the numbers to be multiplied or divided by using fingers.
Apply the four basic rules to the fingers as explained above.
Read the final answer from the fingers.
Jarimatika is a fun way to learn multiplication and division without using calculators or paper and pencil. It can help children develop their logical thinking, memory, concentration, and creativity. It can also enhance their confidence and interest in mathematics.Many studies have shown the benefits of jarimatika for students' mathematical abilities. According to Purwanti and Khoiriyah (2020), jarimatika can improve students' multiplication concept understanding by using tapertis media, which are sticks with different colors and lengths to represent numbers[^1^]. They found that jarimatika with tapertis media was more effective than conventional methods in enhancing students' learning achievement and motivation.
Rini and Margorini (2020) also reported that jarimatika can be implemented in early childhood education by using fingers as learning media[^2^]. They observed that jarimatika can help children develop their logical thinking, memory, concentration, and creativity. They also noted that jarimatika can increase children's confidence and interest in mathematics. They suggested that teachers should study the application of jarimatika method and be ready to accommodate the uniqueness of each child.
Another benefit of jarimatika is that it can be integrated with information and communication technology (ICT) to make mathematics teaching more interactive and engaging. For example, ICT can be used to create digital games, animations, simulations, or quizzes based on jarimatika methods. ICT can also facilitate the communication and collaboration among students and teachers who use jarimatika. ICT can also provide feedback and assessment for jarimatika learning outcomes[^3^].
In conclusion, jarimatika is a fun way to learn multiplication and division that has many benefits for students of different ages and levels. Jarimatika can improve students' mathematical skills, understanding, motivation, and interest. Jarimatika can also be combined with various media and technology to enhance its effectiveness and attractiveness. 29c81ba772