2.3 Review

How many digits are there in the Hindu-Arabic System?

• 9

  [0 isn't a digit, it's a place value]

• 10

  [they're all there]

• 16

  [all our digits and a-f]

• How could we possibly know this?

Round the following number to the nearest million.

72,305,499,897

Mathematical Equivalence

ON

• Million

• Ten-billion

• Hundred-Trillion

• Googol

• Commutative
• Closure
• Associative
• Additive-Identity

Which of the following show decomposition for the following addition problem.

13+7

• 10+(3+7)=10+10=20

• 7+13=20

• 20-13=7

• 13+(3+4)=13+7=20

McKenzie, who is also known as Kensie, loves Germany and anything outdoors. She may have a younger brother, but who knows, she never talks about him.

• True

• False

Answer explanation

Kensie ain't it.

Kensie is from Saratoga Springs and she has an older sister who she once dropped off one evening at the home of a tight-end for the Dallas Cowboy. There's also something in there about wakeboarding, guitar and piano.... but that story about the tight-end was either sketch or awesome!

• True

• False

Don't hide behind Emily's shower curtain if you are playing hide-'n-seek with her. That said, if you are play the game in the dark, she probably fell asleep dreaming of her summer cottage in New England.

• True

• False