easy math test explained
TRANSCRIPT
8/3/2019 Easy Math Test Explained
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a) Wehowthingdecim
a) b)
Now,
every
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ll, I cice thfor y
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10% = 0
A =
;
it is e
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ould be
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Now:
See:
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still
There
tada-
C < A
Like
a)
b)
to expa
an do
the sa
fore:
;
dada-da
< D <
in 1.)
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aaaa no
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raction
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ause
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w you c
ackward
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00% thi
you n
4
4
9 ∗ 4
4 ∗ 4
1 and
n compa
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1060
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g with
∗ 100%
ed to
36
16
numbe
re them
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5
being 1
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ultiply
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quite e
%
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it by
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asily.
would b
1 is
:
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denom
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by 6
BUT N
as th
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le b)
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mmon de
get 18.
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of wh
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ominato
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expand
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r is 18
t’S 24
the nu
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ake the
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e same
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actor
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Well
adds
done.
Here
chang
a) b)
this on
up to 8
Find t
you hav
e in re
108-96=
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e is re
Add u
w other
to ch
ation t
2; 96-8
15 to
ally ea
the “d
s and y
ck for
o the o
4=12; …
the fir
sy. Wha
ados” a
u got i
pattern
e befor
so 72-1
t and k
t combi
d you
t.
s. How
e.
2=60; 6
eep add
ation
re done
does th
-12=48
ng so 9
f the
. 1 6
next
and 48-
0+15=10
hrows
1 8,
umber
2=36.
….
8/3/2019 Easy Math Test Explained
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Check
In th
it gi
Your b
your ba
Given
The t
The a
And t
Solut
Annua
The b
Annua
perce
the re
is exam
ves you
nk paid a
lance 5 mo
in the
ime: 5
nnual r
he inte
ion:
l earni
alance
l rate
ntage:
ation o
le jus
the num
total of €
ths ago?
task is
onth
te: 6%
est ear
gs:
∗
s not k
s 6% an
f the o
add up
ber in
2.50 simpl
nings:
nown so
d to ca
ter num
the nu
he midd
e interest
2,50
it’s a
culate
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with it
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l rate (ann
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you nee
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e trian
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d the d
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Becau
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the s
but t
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See…
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se 5 mo
has obv
of a y
o get t
ide of
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ou can j
oney :
easy :D
, lengt, lengt
ch dire
nth wou
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ar, yo
o the
the equ
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ust cal
andand h
tion so
6%
ld be
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,06 ∗ 5
culate
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he run-
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nt tha
6 ∗5
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8/3/2019 Easy Math Test Explained
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Given
35min
The
multi
So
Themulti
The r
This
is th
s. An h
quation
plied b
ool thplying
ed unit
one is
veloc
ur cons
to ca
the ti
12
ing innd divi
are ca
eems tr
10 ∗
ty at
ists of
lculate
me (t)
∗35
60
math iding:
12 ∗35
60
12
nceling
icky bu
10 ∗ 10
12 km/
60mins
a dis
ravelle
∗
1 2 ∗ 3 5
60
s you
12
0∗ 35
∗
35
60
each ot
it isn
1000
and t
so 35mi
ance (
d:
∗
1
can rea
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7
her out
’t real
e time
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), is
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.
8/3/2019 Easy Math Test Explained
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1. Get the preceding sign out of the equation or at least infront of it:
411 ∗ 7
5 ∗ 5521 4
11 ∗ 75 ∗ 55
21
Negative times negative is positive and positive times negative
is negative. So you’ll end up with:
411 ∗ 7
5 ∗ 5521
Now you can reduce the fraction:
411 ∗ 7
5 ∗ 5521 41 ∗ 1
5 ∗ 53 41 ∗ 1
1 ∗ 13 4 ∗ 1 ∗ 1
1 ∗ 1 ∗ 3 43
To get to that, you can divide the 55 by 11, the 21 by 7 andthan the 5 by 5 (which you got by dividing the 55 by 11). But
bear in mind that you are reducing here and that works always
the same.
This only works with dividing and multiplying not adding or
subtracting!
And
So you are left with the improper fraction:
So you can divide 1 by 3 which is 0,3333333…, add it to the 1
and than make it negative because of the minus in front of all
of it:
,… , …
The same applies to b) but pay attention to the operators!
First divide and multiply than add and subtract!
: ?
8/3/2019 Easy Math Test Explained
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First
learn
The n
do by
secon
down:
Now y
And n
Expan
This
forge
this
front
highl
The w
change
ed:
ext thi
multip
d fract
ou can
ow for
d to a
took me
t to d
case or
or tak
ighted
ay I wo
the
g is t
lying t
on. Tha
educe a
he last
ommon d
∗
half a
ag the
the su
e it do
he path
ld do t
ixed n
divide
e firs
t means
gain:
∗
part a
enomina
hour
negativ
tractio
n to t
of the
his is:
10
mber t
a frac
fracti
you tur
:
∗
d the
or whic
o figur
e sign
in ot
e 8. T
“–“ in
0% -> 1
o an i
ion by
on by t
n the s
∗
∗
:
h here
e out :
along
er case
at get
red…
20
proper
a fract
e reci
cond fr
s 8:
,
D - stu
ith the
s. Neve
you m
Phew…
fracti
ion. Th
rocal
action
id me.
additi
r leave
d like
Next!
n as
s you
f the
pside
Never
on in
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me. I
8/3/2019 Easy Math Test Explained
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So, w
0,12€
with
Which
nor a
Six frien
friends
paymen
Ok he
2 ass
4.500
hen the
to 1,3
1,32€ a
rounds
petrol
ds want to
decide to
t in EUR 4,5
re it g
holes l
€. With
price
2€. The
the st
down t
company
uy land, so
ithdraw fro
0. Calculate
es:
ave th
4 buyer
1%
10% ->
, €
ncrease
next w
arting
10
1% -
10% ->
, €
1,45€
would
that each p
m the deal
the price of
deal w
s that’
>,
, ∗
, €
s from
ek it
rice:
0% -> 1
>,
, ∗
, €
(of whi
ver do
ays the sa
. Each of t
land.
hich ad
18.000
,
,
, €
,20€ by
appens
32
,
,
, €
ch I am
;) )
e. One day
e four rem
s for
€ for a
10% it
again,
sure n
before signi
aining frien
very re
l of th
increa
ut thi
ither
ing the cont
ds must inc
maining
em.
es by
time
bank
ract, two
rease its
buyer
8/3/2019 Easy Math Test Explained
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Now, 2 left and 18.000€ to divide, that leaves 9.000€ per
leaving buyer, which is obviously also the amount of money each
of all 6 buyers would have to pay.
So, to get the total land price now is easy:
∗ . € .€
The equation they show to explain is correct but too
complicated to understand and solve the question. The best
thing is to stick to the plan and given numbers. Although,
maybe we just did their equations with words. :D