1. The calculator music score of "Little Apple" is as follows (press the following number keys in order from left to right for each line, and the same is true for the following songs): 6 4 5 2 6 5 4 5 2 6 4 5 5 8 6 3 4 4 3 2 3 4 5 1 9 8 6 6 5 4 6 5 6 5 8 88888

2. The calculator music score of "Ode to Joy" is as follows: 33455432 1123322 33455432 1123211 2231 23431 23432125 33455432 1123211

3. The calculator music score of "Fairy Tale" is as follows: 5543343 3434321 1356 6652243 135666 522434 321 2366 1171

4. "Beijing Welcomes You" The calculator music score is as follows: 3532323 326132 21612352 365121 3532323 326132

21612352 365621 21612352 36553 2321562 6322135

5. The calculator music score of "The Painter" The spectrum is as follows: 5353531 24325 5353531 24321 2244325 24325 5353531 24321

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A calculator is an electronic machine invented by modern people that can perform numerical operations.

Modern electronic calculators are handheld electronic machines that can perform mathematical operations. They have integrated circuit chips, but their structures are much simpler than computers. They can be said to be the first generation of electronic computers (computers), and their functions are also limited. Weaker, but more convenient and cheap, it can be widely used in business transactions and is one of the necessary office supplies. In addition to displaying calculation results, there are often overflow indications, error indications, etc. The calculator uses an AC converter or battery as its power source, and the battery can be recharged with an AC converter or solar converter. In order to save power, calculators use large-scale integrated circuits made with CMOS technology.