# MATHEMATICS FORM ONE-UNITS

MATHEMATICS FORM ONE-UNITS

UNAWEZA JIPATIA NOTES ZETU KWA KUCHANGIA KIASI KIDOGO KABISA:PIGA SIMU:0787237719

## MATHEMATICS FORM ONE-UNITS

UNITS OF LENGTH
Basic unit of length is meter.
Other unit are such as :-
 Unit Symbol Millimeter mm Centimeter cm Decimeter dm Meter m Decameter dam Hectametre hm Kilometer km
Km hm dam m dm cm mm
1 0 0 0 0 0 0
1 0 0 0 0 0
1 0 0 0 0
1 0 0 0
1 0 0
1 0
1
EXAMPLES
1. Convert 9.17m into km

2. Convert 2/51km into :-

(a) dm (b) mm (c) hm(A)

(a)

(b)

OPERATIONS ON UNIT OF LENGTH
Question
1. Add together the following length (a) 785m, 97m, 605m, (b) 8dam, 9m, 2cm (Give your answer in metre.

Solution

SUBSTRATION
EXAMPLE

perform the following

MULTIPLICATION
EXAMPLES

DIVISION

Perform the following meter.

EXAMPLE

3. Find the following in meter

EXERCISE

2. A roil of string ps 8.3 metres long. pieces of string of length 2.30m, 78m, 2.37m and 0.95m are cut off. The remaining part is divided into equal pieces of length 32cm. How many equal pieces are there?

There are 19 pieces.

### MATHEMATICS FORM ONE-UNITS

OPERATION ON UNITS OF MASS

EXAMPLE

60 seconds = 1 minutes
60 minutes = 1 hour
24 hour = 1 day
7 days = 1 week
4 week = 1 month
28, 29, 30 or 31 days = 1 month
12 month = 1 year
365 or 366 days = 1 year
365 or 36 days = 1 year
Time can be measured by using a clock.
There are two ways of reading time clock :-
(i) By reading time in 12 hours

(ii) By reading time in 24 hours.

EXAMPLES
1. Change 25 minutes past 10 in the following using :-
(a) 12 hours clock
(b) 24 hours closk
Solution:
(a) 12 hours clock
10:25am
(b) 24 hours clock
10:25 hours
2. Write the following times using a 24 – hours clock :
(a) 6: 30 am
(b) 9: 45 p.m
. Solution:
(a) 6:30 a.m it will be in 24 hours is 0630 hours
(b) 9:45 p.m it will be in 24 hours is 2145 hours.
3. Write the following times in words using 12 hours clock :-
(a) 2040
(b) 2349
Solution :
(a) 08:40 p.m
It is forty minutes past eight. Twenty minutes to nine.
(b) 11:49 pm
It is four nine minutes past eleven .
Eleven minutes to twelve

3. Write the following times using a 24 hours clock.
(a) 3:20p.m
(b) 5:37 p.m
(c) 70:53 a.m
Solution
(a) 1520 hours
(b) 1737 hours
(c) 0453 hours
UNIT OF CAPACITY
The basic unit is litre (l)

Other unit are:

NOTE:
1l = 1000cm3
1k = 10000l
1? = 1000ml
Conversion of unit of capacity
EXAMPLES
Change the following into cm3:-
(a) 6.5 litre

(b) 35 litre

EXERCISE
1. One litre of cooking oil cost sh. 700. Find the cost of 15 litres
Solution:
Sh. 700 x 15 litres
= Tsh 10,500
2. Doto sells 1 litre of milk for sh. 100. How many litres of milk should Doto sell to get sh. 34,800?