Points, Lines, Planes
3-7
-4
35 + x = 90
55
2x − 60 = 30
45
2.3 + ( − 1.4)
0.9
32 = 9 52 = 25 112 = 121 172 = 289
The square of an odd number is an __________ number.
odd
37-48
-11
x − 34 = 146
180
80 + 5x = 360 − 4x
20
− 40.5 + 3.07
-37.43
42 = 16 82 = 64 142 = 196 202 = 400
The square of an even number is an __________ number
even
8-(-2)
10
3x=180
(x + 6) + 3x = 90
21
1/3 + (− 1/2)
-1/6
2 + 5 = 7 15 + 4 = 19 22 + 13 = 35 14 + 37 = 51
The sum of an odd number and an even number is an __________
number.
odd
15-(-18)
33
− x/3 = 17
-51
(3x + 1) + (2x − 6) = 180
37
-3/4 + 3/8
-3/8
5 × 10 = 50 13 × 10 = 130
18 × 10 = 180 23 × 10 = 230
The product of any number and 10 is a number that
ends in___.
zero
At 7 P.M., the temperature was 4°C. By 8 P.M., it had
increased 2°C. By 9 P.M., it had decreased 1°C. By 10 P.M., it had
decreased 15°C. What was the temperature at 10 P.M.?
-10°
Russia, the largest country in the
world in terms of area, occupies 6,592,800 square
miles. The difference in area between Russia and
Canada is 2,740,991 square miles. Write and solve
an equation to find the area of Canada.
x + 2,740,991 = 6,592,800; 3,851,809 mi2
The difference between the weight of
3 gallons of liquid and 5-pound brick is 19 pounds.
Write an equation to represent this situation. What
is the weight of 1 gallon of the liquid?
3x −5 = 19; 8 lb
Ms. Takanawa has three bank accounts.
The balances in the accounts are $436.12, $1178.05, and −$0.05.
How much money does she have altogether in these accounts?
$1614.12
12→1 + 2 = 3 24→2 + 4 = 6
36→3 + 6 = 9 132→1 + 3 + 2 = 6
If the sum of the digits of a number is divisible by _ ,
then the original number is divisible by _ .
3, 3