DEPRECATED Properties of multiplication 2

Taken down in 2015 for quality reasons.

Problem

My sister knows her multiplication facts from 1 to 5 and for 10.
Show her how she can use this information to find 3, times, 7.
space, start color red, 3, end color red, times, start color blue, 7, end color blue
equals, start color red, 3, end color red, times, left parenthesis, start color blue, 10, minus, end color blue
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
right parenthesis
equals, start color red, 3, end color red, times, start color blue, 10, minus, end color blue, start color red, 3, end color red, times
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4

equals, start color purple, 30, end color purple, start color blue, minus, end color blue
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4

equals
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4