Page 47 - Math Smart - 7

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O The temperatures in four cities are recorded at Evaluate,
the same point in time. a) (-14)-47 b) (-139)-139
1
City o Temperature c) 13 + (-43) d) 37 + 42
Albany 4°C e) (-52)-41 f) (_i4) + (_ii)

Anchorage -7°C g) 12+ 15 + (^) h) 12-(-10)-8
i) 20 +13-(-8) ]) (-21)+ (-13)-11
Buffalo -6°C
k) 16+ (-12+ 5) I) (32-21)+ (-21)
Reno ire
O A window cleaner started on the 25^^ floor. He
a) List the cities in order from the lowest to
climbs up 3 floors, then descended 17 floors.
the highest temperature.
How many more floors must he descend to get
b) How much warmer is Reno than
to the ground floor?
Anchorage?
c) What is the temperature difference
between Albany and Buffalo?
d) If the temperature of Buffalo increases
by 11 °C, what is the temperature after
the change?

A bank manager is looking at some bank
accounts. Help her complete the table.

Before Change After
a) $26 Withdrawal of $60
b) $40 Deposit of $25

c) $30 -$60
Challenge! A magic square is a square in
d) $20
which all the numbers in each row, column
and diagonal add up to the same number.
O Calculate. This number is called the magic number.
a)(-12)+ 8 b)(-11)+ (-7) a) What is the magic number of this magic
square?
0 12+ (-8) d) 18+ (-27)
b) Use the magic number to find the
e) 33 + 504 f) (-47)+ 19
missing values.
g) (-1) + (-49) h)(-31)+ 100
i) (-39) + 50 j) (38)+ (-15)
k) 0 + (^) 1) 2 + 0 + (-6)
O Work out each of the following.

a) 4-(-4) b) (-11)-10
c) 84-(-7) d) (-18)-(-6)
e) 121 -(+20) f) 148-(-39)
-2
g) (-18)-(22) h) (-58) - 30
i) 0-(-8) j) (-10)-(-13)
k) 0-(+12) 1) (-1)-(-5)-(+21)