Date post: | 22-Dec-2015 |
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Objectives• Change the form of numbers into
scientific notation• Change scientific notation into
standard notation• Identify the millions, billions,
trillions… places
For five minutes, change the following into scientific notation.
• 20,000• 100,500,000• 0.00000021• 0.00000173• 120537 x 108
• 0.00002 x 1017
• 0.00000001 x 10-11
• 123 x 0.0011 x 109
Find the result.
1. (1.31 x 105) + (2.29 x 106) – (0.113 x 107)
First, change them into the same base 10. Second, FACTOR same base 10 and exponent.
Page 15
• 9,500,000 people means: • 9 million, 5 hundred thousand• 9.5 x 106
• 4,000,000,000 means:• 4 billion• 4 x 109
Read conveniently
• 22.4 x 109
• twenty-two point four billion• 127 x 1010
• 1.27 x 1012 One point twenty-seven trillion
• 3 x 1011
• 300 x 109 three hundred billion
• 385 x 1012
• Three hundred eighty-five trillion• 7914 x 1013
• 79.14 x 1015 seventy-nine point fourteen quadrillion
• 19 x 1014
• 1.9 x 1015 one point 9 quadrillion
• 123.5 billion baht plus 800 million baht equals how many billion baht?
• First, change to standard form (notation).
• Second, add them.• Then, change them into short word
form.
More than and less than
• Page 16-17• 12.2 billion baht is more than 11.9
billion baht by how many million baht?
• 12,200,000,000 = 11,900,000,000 + x
• 170,000,000,000 = 1,000,000,000,000 - x