Margaret Hamilton joined the Apollo Project as NASA’s first computer programmer in 1965!!!
Not only was she the first person to use the term SOFTWARE ENGINEER, her computer programming skills saved the Apollo 11 space capsule from crashing during the 1969 landing on the moon.
She was presented with the PRESIDENTIAL MEDAL OF FREEDOM by President Obama in 2016.
Tell your students you will beat them adding up 5 x 5 digit numbers in your head when they are using calculators.
Method:
1. Ask a student to write down 2 x 5-digit numbers on the board.
2. You rapidly write a 5-digit number underneath.
3. Ask another student to write another 5-digit number.
4. You write another 5-digit number quickly.
5. You have 5 by 5 digit numbers. Say ‘Go’. You instantly write down the answer.
Stand back.
This is how it works:
N1 = 97413
N2 = 28619
N3 = 71380 (Each digit in N3 that you write down must add up to 9 with digits in No. above)
N4 = 64231
N5 = 35768 (Once again each digit in N5 must add up to 9 with digits above)
Now you will instantly write down the sum of these five numbers as
297411
Da! DA!
The trick is to subtract 2 from N1 and put it in front:
N1 = 97413
N1 -2 = 97411
Sum of 5 numbers = 297411
This is why it works:
Hint: When you get your students to add up the five 5-digit numbers on a calculator you will beat them, but they will also get many different answers as a number of students will key incorrect numbers.
They take their maths seriously in Germany. They have monuments to mathematicians. They name streets after mathematicians. They take maths into shopping malls.
They think maths is so important they even put maths on stairs. Here is some times tables art from Germany.
