Pre-Algebra
HOW MANY TIMES LARGER II
Without using a calculator multiply or divide the following problems:
1) 3.25 ÷ 10
2) 685.34 ÷ 102
3) 87 * 105
4) 2.41 * 107
For questions 5 – 10, determine about how many times larger the first number is than the second
number. You should not need a calculator. In some cases you will be determining approximately how
many times larger.
5) 10 than 2
7) 106 than 103
6) 10 than 4
9) 16 * 106 than 5 * 104
8) 7.5 than 3
10) 21 * 109 than 5 * 106
For questions 11 – 13 you are given the areas of two squares, determine how many times larger one
square is than the other.
11) A1 = 30 m2 A2 = 6 m2
12) A3 = 49 in2 A4 = 12 in2
13) A5 = 25 cm2 A6 = 8 cm2
14) If you have a square with sides that are one ft long, and you double the length of each side, what
happens to the area?
15) If you have a rectangle whose length is 3 meters and whose width is 5 meters and you double the
length and triple the width, how many times greater will the new area be?
KEY
1) 0.325
2) 6.8534
6) 2.5 times larger
3) 8,700,000
7) 1,000
10) about 400 times larger
13) about 3 times larger
4) 24,100,000 5) 5 times larger
8) 2.5 times larger
9) about 300 times larger
11) 5 times larger
12) about times larger
14) it grows 4 times larger
15) it grows 6 times larger