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MTN Methods (Millions, Thousands and Normal)

Millions

M

H T O

Thousands

T

H T O

Normal

N

H T O

H = Hundred T = Ten O = One

From right to left, we divide a whole number into 3 parts – Millions,

Thousands and Normal.

Each of this part, consisits of Hundreds, Tens and Ones.

The MTN Methods help pupils to identify the place value and then

read the number and write number words in numerals.

PLACE VALUE CHART

Millions Hundred

Thousands

Ten

Thousands

Thousands Hundreds Tens Ones

M H TH T TH TH H T O



ROUND OFF

Rules To remember for rounding off

* 0, 1, 2, 3, 4 - retain the digit

* 5, 6, 7, 8, 9 - add by 1

Example 1 :-

Round off 725 246 to the nearest tens (10)

+1

Circle the tens 7 2 5 2 4 6

# Since the digit to the right of (behind)the circle is larger than 5,

then add to the digit 4 and a zero after it. The answer will be 725 250.

Example 2 :-

Round off 418 327 to the nearest hundreds (100)

0 0

Circle the hundreds 4 1 8 3 2 7

# Since the digit to the right of (behind) the circle is less than 5, the

“3” remains but add 2 zeroes after it. The answer will then be 418 300.



ADDITION

How to Add Repeatedly

Example :-

22 432 + 3 012 + 524 =

22 432 25 444

+ 3 012 + 524

25 444 25 968

OR

22 432

+ 3 012

25 444

+ 524

25 968

SUBTRACTION

How to Subtract Repetedly

Example :-

22 432 - 3 012 - 524 =

22 432 25 444

- 3 012 - 524

19 402 18 896

OR

22 432

- 3 012

19 420

- 524

18 896



MULTIPLICATION

Method 1 :- Standard Written Method

80 283x 46

481 698 ( 80 283 x 6)

+ 3 211 320 ( 80 283 x 40)

3 693 018

Example :- Multiply 46 by 80 283 = 3 693 018

Method 2 :- Lattice Multiplication

8 0 2 8 3

3

2

0

0

0

8

3

2

1

24

4

8

0

0

1

2

4

8

1

86

3 6 9 3 0 1 8

FRACTIONS

IMPROPER FRACTION

# Consist a larger numerator than the denominator

Example 1 :-

3 Numerator (Larger)

2 Denominator ( Smaller)

Read as three over two or three halves



Example 2 :-

Write seven over three in numeral

We write it 7

3

MIXED NUMBERS

Mixed numbers consists of a whole number and a proper fraction1

2 4

Whole Number Proper Fraction

We read as “ Two and One Over Four” or “ Two and One Quarter”

DECIMALS

Round off to the nearest tenths

Round off 12.302 to the nearest tenths

i. Determine the place value you want to round off (the rounding digit)

and circle it.

ii. Look at the digit just to the right (behind) and underline it.

(the digit just to the right)

1 2 . 3 0 2 = 1 2 . 3

(the rounding digit)

Note : -

If the underlined digit is less than 5, do not change the rounding digit but drop

all digits ti the right of it.

If that digit is greater than or equal to five, add one to the rounding digit and



drop all digits to the right of it. (See example as shown below)

Any Number

Less than 5 More than 5

0 1 2 3 4 5 6 7 8 9

0 1

Rounding down Rounding up

VARIOUS CONVERSION

1 LITER - 100ML

% (Percentage) - (Fraction)

1 Century - 10 Decades

1Decades - 10 Years

1 Years - 12 Months

1 Months - 30 Days

1 Days - 24 Hours

1 Hour - 60 Minutes

1 Minutes - 60 Seconds

1 Km - 1000 m

1 m - 100 cm

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