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Think About It
By using a calculator: 2 ¡V 5 = ¡V3
Concept Check
p. 10
On a number line, 2 numbers lie 0.5 units away from the origin.
The numbers are: +0.5 and ¡V0.5
p. 11
¡V30.1 is on the left hand side of ¡V30.
¡V30 is larger than ¡V30.1.
Think Further
p. 11
The opposite number of the smaller positive number is greater than that of the larger one.
p. 30
It is negative.
p. 34
If an expression has an even number of negative numbers, and it contains '  ' and '  ' signs only, then the sign of its value is positive.
Let's Discuss
p. 23
1. Amy's method
2. (a) (¡V59) ¡V (¡V7) = ¡V59 + 7 = ¡V52
¡@(b) (¡V33) + (+16) = ¡V33 + 16 = ¡V17
3. (a) (+50) + (¡V82) = +50 ¡V 82 = ¡V32
¡@(b) (¡V27) ¡V (+24) = ¡V27 ¡V 24 = ¡V51
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