Rounding, Percent, Exponents MPM1D Jensen Name:________________________ Rounding
1. Round each number as indicated
a) 17 423 to the nearest thousand
d)205 481 to the nearest ten
b) 73.86 to the nearest one
e)439.551 to the nearest tenth
c) 0.846 to the nearest hundredth
f)2.3987 to the nearest thousandth
2. Round to the value indicated
a) Round 948 596 km to the nearest thousand kilometres.
b) Round 1923 km to the nearest ten kilometres.
c) Round 4.96 m to the nearest tenth of a metre.
d) Round 3953.9 m to the nearest metre.
e) Round 5689 g to the nearest hundred grams.
f) Round 79.861 kg to the nearest hundredth of a kilogram.
1) a) 17000 b) 74 c) 0.85 c) 205480 e) 439.6 f) 2.399 2)a) 949000 b) 1920 c) 5 d) 3954 e) 5700 f) 79.86 7
3
9
5) see solutions page 4) 1944 5) 282.50 6) 100 7) a) 2 b) 10 c) 3 8) a) 5x5x5 b) 15x15x15 c) 7x7x7x7x7x7x7 9) a) 16807 b) 6561 c) 20736 d) 7776 e) -­‐1.96 f) 185.2 10) a) 2 b) 7 c) 12 d) 13 e) 15 f) 1 11) B Rounding, Percent, Exponents Percent
3. Complete the chart:
Fraction
Decimal
Percent
3
15
17
20
23
40
0.3
0.15
0.05
50%
80%
34%
4. 27% of the books in the school library are hardcover. If there are 7200 books in the school library, how many
are hardcover?
5. Mr. Jensen bought a new hockey stick for $250. How much did he pay including the 13% tax?
6. Mr. Jensen’s shooting percentage (with the new stick he bought) during last year’s hockey season was 40%.
Mr. Jensen took 250 shots throughout the season. How many goals did he score? Did he break Wayne Gretzky’s
record of 92 goals in one season?
Rounding, Percent, Exponents Exponents
7. Write each expression as a power.
Do not evaluate.
8. Write each power in expanded form.
Do not evaluate.
a) 2 × 2 × 2 × 2 × 2 × 2 × 2
a) 53
b) 10 × 10 × 10
b) 154
c) 3 × 3 × 3 × 3 × 3 × 3 × 3 × 3 × 3
c) 77
9. Evaluate each power using a calculator
a) 75
d) 65
b) 38
e) -1.42
c) (-12)4
f) 5.73
10. Find each square root without using a calculator
a)
4
d) 169
b)
49
e) 225
c)
144
f) 1
11. On a TV game show, you are offered three choices for a prize, in dollars.
A double your age, squared
B2 to the exponent of your age
Cthe square root of your age, cubed
Which offer would you take and why?