Using Negatives
-3 x 6
-18
5y = 35
y = 7
5a + 2 = 7
a = 1
x/7 = 4
x = 28
How do you make the number seven even, without using addition, subtraction, multiplication or division?
Drop the s
-4 - 7
-11
w + 5 = 12
w = 7
6x + 5 = 47
x = 7
a/2 + 5 = 4
a = 18
Can you write down eight 8s so they add up to 1000?
888 + 88 + 8 + 8 + 8
-7 x -6
42
k - 5 = -2
k = 3
2x - 3 = 11
x = 7
g/5 - 3 = 1
g = 20
What is the first step in order of operations?
Brackets
4 + (-5)
-1
7f = 42
f = 6
9 + 5d = 24
d = 3
t/6 - 2 = 3
t = 30
When using backtracking/flowcharts to solve, what should you start with?
Writing down the unknown/letter
-2 - (-8)
6
c - 4 = -7
c = -3
7 - 3m = 4
m = 1
b/4 - 12 = -5
b = 28
I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?
194