Decimal Form Of Rational Numbers Worksheet - Chapter 2.2, Mathlink 9, Mcgraw-Hill Ryerson School Page 8
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8One week in October in Iqaluit, Nunavut,
23.
Extend
the daily high temperatures were -4.6 °C,
Four points, A, B, C, and D, have the
26.
-0.5 °C, 1.2 °C, 2.3 °C, -1.1 °C, 1.5 °C,
following coordinates:
and -3.0 °C. What was the mean daily high
A(0.75, 0.81)
temperature that week?
B(0.75, -0.65)
C(-1.22, -0.65)
Did You Know?
D(-1.22, 0.81)
Iqaluit is the capital of Nunavut. This territory covers
What is the area of quadrilateral ABCD, to
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1
__
_____
almost
of the area of Canada but has less than
of
the nearest hundredth of a square unit?
5
1000
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__
the Canadian population. Over
of the people who live
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in Nunavut are Inuit.
The mean of six rational numbers is -4.3.
27.
What is the sum of the rational numbers?
a)
If fi ve of the numbers each equal -4.5,
Web Link
b)
what is the sixth number?
For more information about Nunavut, go to
and follow the links.
Evaluate each expression.
28.
Copy and complete each statement.
24.
3.6 + 2y, y = -0.5
a)
+ 1.8 = -3.5
a)
(m - 1.8)(m + 1.8), m = 1.7
b)
-13.3 -
= -8.9
b)
q
4.5
___
___
, q = -3.6
q -
c)
× (-4.5) = -9.45
c)
4.5
= 7.4
-18.5 ÷
d)
Add one pair of parentheses or square
29.
brackets to the left side of each equation to
Create a word problem that involves
25.
make a true statement.
operations with rational numbers in
3.5 × 4.1 - 3.5 - 2.8 = -0.7
a)
decimal form. Make sure you can solve
2.5 + (-4.1) + (-2.3) × (-1.1) = 4.29
b)
your problem. Then, have a classmate
solve your problem.
-5.5 - (-6.5) ÷ 2.4 + (-1.1) = -0.5
c)
Play this game with a partner or in a small group. You will need two
dice and one coin.
• For each turn, roll the two dice and toss the coin. Then, repeat.
• Create numbers of the form . from the result of rolling the
two dice.
• Tossing heads means the rational numbers are positive. Tossing
gives the pair 1.2
gives the pair
tails means the rational numbers are negative.
and 2.1
-5.6 and -6.5
• Record the two pairs of numbers.
• Choose one number from each pair so that the sum of the
chosen numbers is as close as possible to zero. Record the sum
The four possible sums are
of the chosen numbers.
1.2 + (-5.6)
1.2 + (-6.5)
• In each round, the player with the sum one closest to zero wins
2.1 + (-5.6)
2.1 + (-6.5)
two points. If there is a tie, each tied player wins one point.
Estimation shows that 2.1 + (-5.6) is
• The winner is the fi rst player with ten points. If two or more
closest to zero, so calculate this sum.
players reach ten points in the same round, keep playing until
2.1 + (-5.6) = -3.5
one player is in the lead by at least two points.
62
MHR • Chapter 2
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