Multiplication
Powers (compare 2^(3^2) and (2^3)^2 etc). More about bracket forming.
Guess number trick:
- think of a number;
- add 5;
- double the result;
- subtract the original number;
- add 10;
- subtract the original number again.
Solar eclipse (start at 0:45)
Lunar eclipse (start at 0:30)
Homework:
Powers (compare 2^(3^2) and (2^3)^2 etc). More about bracket forming.
Guess number trick:
- think of a number;
- add 5;
- double the result;
- subtract the original number;
- add 10;
- subtract the original number again.
Solar eclipse (start at 0:45)
Lunar eclipse (start at 0:30)
Homework:
- Invent your own number trick
- Compare: 222222 and 3(33)
- Find: 1111111 * 1111111; 11111111*11111111
- What is the phase of moon during the lunar eclipse? solar eclipse?
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