Think About Using the number 2 exactly 3 times, fi nd a way of writing a mathematical sentence that will give you 24 (for example, 2 + 2 + 2 = 24 – obviously this one doesn’t work!).
Now see if you can do it using the number 3 exactly 3 times, again giving a value of 24. (This one requires a little more thought!)
Homework 1. Work out the value of these. a) 52
e) 122 i) 262
= = =
b) 72
f) 152 j) 312
2. Fill in the blanks. a) 9 is the square root of c) 13 is the square root of e) 20 is the square root of
b) 93
= = =
.
. .
3. Now work out the value of these. a) 83
c) 35
c) 62
g) 182 k) 352
= = =
d) 102 h) 222 l) 422
b) 3 is the square root of d) 16 is the square root of f) 24 is the square root of
d) 272 e) 13
= = =
.
. .
f) 104
Recap • I can identify square numbers. • I know what a square root is. • I know what numbers written in exponential form mean.