Numerical skills for accounting

  1. BODMAS

B = Brackets, O = order = power, D = division, m = x, A = +, S = -

  1. Memory function

M, memory for B292

  1. Rounding

Below 5 round down

  1. Fractions

Part of something & whole

  1. Ratios

Divided up

  1. Percentages

Rate of 100, 30% 30 out of 100

  1. Negative numbers

Number small than 0

  1. Reasonableness
  1. Powers & roots
  1. Equations
  1. Sim equations

Different numerical values = variable

X by itself for number equired

Weather the answers looks right or wrong key

Not possible to find x, y

Fraction answer, shift=

Shift RCL M+ or RCL or STO

Msq = ALP M+x2 =

Above 5 round up

3.3333 = 3.33, 17.346 = 17.35, 21.345 = 21.35, 368.24567 = 368.25, 2 d.p

Significant figures s.f ignores 0 after d.p

Divide top numerator with bottom denominator for d.p

Good example p18

Example tips £64 5:8:3 =16, 64/16= 4 then x ratios

14/20 x 100 = 70

Example 70% = 70/100 or 0.7, 10% = 10/100 or 0.1

9/10 = 0.9 x 100 = 90%, 2/4 = 0.5 x 100 = 50%

20% profit £45000 includes x 100/120=37500

5% on dividend £150000 x 5% = 7500

add is same -, - is same +

  • x - gives -, + / - gives -
  • x - gives +, - / - gives +

Examples p. 26

x2 = sq, x3 = cub xn = number of times

Sq roots opposite of power 3 sq power 9

Cube root x by itself twice = original number

Add powers x5 x x6 = x11

subtract powers x5 / x3 = x5-3 = x2

Raising power : multiply indices (x2)3 = (3 x 3) x 3

or (x2)3 = x2x3 = x6

power 1 = that number, 0 is 1, 1 power is 1

power can be fraction = sq root

a, b, c, x, y, z, must do the same with both sides

4x + 7 = 19, -7 = 4x = 12, / 4 x = 3

Examples on p. 30

Still need work

Examples p. 32