math chapter 1.1 form 1 by kelvin

8/15/2019 Math Chapter 1.1 Form 1 by Kelvin

http://slidepdf.com/reader/full/math-chapter-11-form-1-by-kelvin 1/15

Mathematics – Form 1

Chapter 1.1

By Kelvin



WHOLE NUMBE!

1. Whole n"m#ers are $%1%&%'%(%)%*%+%,%-%1$%11%1&%....

&. /ero0 is the rst 2hole n"m#er.

'. Whole n"m#ers can #e 2ritten in 2or3s or 4"res.

(. Each 2hole n"m#er is ma3e "p o5 the 3i4its 5rom $to -.

For e7ample89

a0 '$( is ma3e "p o5 the 3i4its '%$ an3 (.

:t is rea3 as ;three h"n3re3 an3 5o"r;.

#0 (&*' is ma3e "p o5 the 3i4its (% &% * an3 '.

:t is rea3 as ;5o"r tho"san3 t2o h"n3re3

an3 si7ty9three;



<0 =lace >al"e an3 >al"e o5 Each ?i4it inWhole N"m#ers.

1. Each 3i4it in a 2hole n"m#er has its o2nplace val"e.

&. @he place val"es 5or 2hole n"m#ers incl"3e"nits ones% tens% h"n3re3% tho"san3%

h"n3re3% tho"san3% ten tho"san3% millionsan3 so on.

'. @he val"e o5 a 3i4it in a 2hole n"m#er3epen3s on its place val"e.

) -+& ('* is rea3 as ;ve million nineh"n3re3 an3 seventy95o"r

tho"san3 t2o h"n3re3 an3 thirty 9si7.



WorAe3 E7ample

Write the 5ollo2in4 in 2or3s.

a0 )'$ &+(

!ol"tion

a0 ve h"n3re3 an3 thirty tho"san3 t2o

h"n3re3 an3 seventy95o"r.WorAe3 E7ample

Write the 5ollo2in4 in 4"res.

a0 ve tho"san3 si7 h"n3re3 an3 t2enty9

5o"r.

!ol"tion

a0 ) *&(



WorAe3 E7ample

!tate the place val"e o5 3i4it + in each o5 the 5ollo2in4

n"m#ers.

a0 )+' c0 '$+ ,(&

#0 - +$( 30 + -)1 *)$

!ol"tion

a0 ten c0 tho"san3

#0 h"n3re3 30 millionsWorAe3 E7ample

!tate the val"e o5 3i4it - in each o5 the 5ollo2in4 n"m#ers.

a0 '-1 c0 &- +1$

#0 - $$( 30 ( -)1 *)$!ol"tion

a0 -$ c0 - $$$

#0 - $$$ 30 -$$ $$$



B0 o"n3in4 o N"m#ers

< n"m#er can #e ro"n3e3 o to a certain

place val"e #y 5ollo2in4 the r"les #elo2. LooA at the 3i4it on the ri4ht

ne7t to the place val"e involve3.

a0 :5 the 3i4it is ) more% a33 1 to the 3i4it at

the place val"e involve3 an3replace all the other 3i4its on its ri4ht 2ith

eros.

#0 :5 the 3i4it is less than )% retain the 3i4it asit is at the place val"e

involve3 an3 replace the other 3i4its on itsri4ht 2ith eros.



c)Estimation1.Inour daily life, we useestimatio nwhen an accurateansweris unnecessary.

2. We of t enuserounding of f t ogiveanes t imat iont o t heac t ualvalue.



<??:@:ON

OF WHOLE NUMBE!.

<0 <33ition

1. <33ition is a process o5 n3in4 thetotal o5 t2o or more n"m#ers.

&. @he total is also Ano2n as the s"m.

For e7ample89

@he s"m o5 '$$ an3 ) $$$ is ) '$$.'. @he or3er o5 a33ition o5 n"m#ers

3oes not chan4e s"m.



4.The sum of any number and 0 is the numberitself. For example:-

(a) 12 0 ! 12

(b) 0 " ! "#. Follo$ the steps belo$ $hen %arryin& outaddition. 'tep 1:- rran&e the numbers a%%ordin& totheir pla%e alues. 'tep 2:- dd from ri&ht to left.



B0 =ro#lem !olvin4 involvin4 <33ition

WorAe3 E7ample

@here are &) apples% ' +*$ 3"rians an3 -(, oran4es inMr @an;s stall.

Fin3 the total n"m#er o5 5r"its in his stall.

!ol"tion

1. Un3erstan3 the pro#lem Diven in5ormation89

N"m#er o5 apples &)

N"m#er o5 3"rian ' +*$

N"m#er o5 oran4es - (, Fin389 @otal n"m#er o5 5r"its

&. ?evise a plan

Use a33ition.



*. +arry out the plan.

4. +he%, dd a&ain to see if the ans$eris the same.



@H<NK! FO !EE @H:!

CH<=@E.

@H:! @HE L<!@ OF @HECH<=@E 1.1.

NEG@ CH<=@E :! COM:ND!OON <@

1&&&$1*..

math chapter 1.1 form 1 by kelvin

Documents