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Wiskunde

Desimale breuke

Opvoeders afdeling

Memorandum

11.1 a) 41c

b) 42

c) 44c

11.2 Rond af

11.3.1 a) Kyk na die 2de syfer ná komma (100stes)

Indien 5,6,7,8,9: 10des - syfer 1 meer

Indien 4,3,2,1,0: 10des - syfer dieselfde

Vervang alles ná 10des met nulle.

b) Kyk na 3de syfer ná komma

Indien 5,6,7,8,9: Honderdstes word 1 meer

Indien 4,3,2,1,0: Honderdstes bly dieselfde

Vervang alles ná 100stes met nulle.

c) Kyk na 4de syfer ná komma

Indien 5,6,7,8,9: Duisendstes word 1 meer

Indien 4,3,2,1,0: Duisendstes bly dieselfde

Vervang alles ná 1 000stes met nulle

11.4 a) 4,5

9,9

5,3

7,6

52,6

88

11.4 b)

6,41 8,60 7,26 9,49 5,03 6,29

11.4 c) (i) (ii)

(iii) (iv)

(v) (vi)

12.2 a) 11

b) R406

c) 6

d) 5

e) R327

f) 8

g) 9

h) 14

i) 448

j) 1 390

Leerders afdeling

Inhoud

Aktiwiteit: desimale breuke en afronding [lu 1.4.2, lu 1.7.1]

11.1 DESIMALE BREUKE EN AFRONDING

Werk saam met ’n maat. Kyk na die sketse. Wat kos een aartappel in elke geval?

11.2 Rond die volgende af tot die naaste heelgetal. Skryf die ooreenstemmende letter neer en kyk watter woord kruip hier weg!

A B D E F G I
8 39 6 7 16 236 9
K L M N 0 R S
17 237 15 38 35 4 150
T N
3 149

a) 8,047

b) 15,51

c) 3,7

d) 35,236

e) 149,089

f) 6,4

g) 35,09

h) 38,456

i) 15,912

j) 236,199

k) 235,89

Skryf jou antwoord hier neer: ...........................................................................

11.3.1 Werk in groepe van drie. Formuleer reëls / metodes vir die volgende:a) Afronding tot een syfer na die desimale teken:

…………………………………………………………………………………………..

…………………………………………………………………………………………..

…………………………………………………………………………………………..

…………………………………………………………………………………………..

b) Afronding tot twee syfers na die desimale teken:

…………………………………………………………………………………………..

…………………………………………………………………………………………..

…………………………………………………………………………………………..

…………………………………………………………………………………………..

c) Afronding tot drie syfers na die desimale teken:

…………………………………………………………………………………………..

…………………………………………………………………………………………..

…………………………………………………………………………………………..

…………………………………………………………………………………………..

11.3.2 Vergelyk julle antwoorde met die res van die klas s’n.

11.4 a) Voltooi die volgende vloeidiagram:

b) Kyk of jy die tabel korrek kan voltooi:

Getal 4,368 6,411 8,599 7,255 9,493 5,034 6,286
Afgerond tot twee desimale syfers 4,37 ............. ............. ............. ............. ............. .............

c) Rond af tot drie syfers na die desimale teken. Trek ’n sirkel om die korrekte antwoord:

12.1 Onthou jy nog?

1 000 ml = 1 liter

1 000 g = 1 kg

1 000 kg = 1 tonne

1 000 liters = 1 k

1 000 m = 1 km

100 c = R1,00

12.2 Vul die ontbrekende antwoorde in:

bv. 3 521 mm tot die naaste m = 4 m

a) 11 296 mm tot die naaste m = ......................... m

b) R406,38 tot die naaste rand = R.........................

c) 6 455 liter tot die naaste k = ......................... k

d) 4 823 kg tot die naaste ton = ......................... t

e) 32 687 c tot die naaste rand = R.........................

f) 8 388 g tot die naaste kg = ......................... kg

g) 8 630 m tot die naaste liter = ......................... liter

h) 14 277 m tot die naaste km = ......................... km

i) R4,4839 tot die naaste sent = ......................... c

j) R13,9021 tot die naaste sent = ......................... c

Assessering

Leeruitkomste 1: Die leerder is in staat om getalle en die verwantskappe daarvan te herken, te beskryf en voor te stel, en om tydens probleemoplossing bevoeg en met selfvertroue te tel, te skat, te bereken en te kontroleer.

Assesseringstandaard 1.4: Dit is duidelik wanneer die leerder herken en gebruik ekwivalente vorms van die bogenoemde rasionale getalle, insluitend:

1.4.2 desimale breuke;

Assesseringstandaard 1.7: Dit is duidelik wanneer die leerder skat en bereken deur geskikte bewerkings vir probleme wat die volgende behels, te kies en te gebruik:

afronding van getalle tot minstens een desimale .

Questions & Answers

how did you get 1640
Noor Reply
If auger is pair are the roots of equation x2+5x-3=0
Peter Reply
Wayne and Dennis like to ride the bike path from Riverside Park to the beach. Dennis’s speed is seven miles per hour faster than Wayne’s speed, so it takes Wayne 2 hours to ride to the beach while it takes Dennis 1.5 hours for the ride. Find the speed of both bikers.
MATTHEW Reply
420
Sharon
from theory: distance [miles] = speed [mph] × time [hours] info #1 speed_Dennis × 1.5 = speed_Wayne × 2 => speed_Wayne = 0.75 × speed_Dennis (i) info #2 speed_Dennis = speed_Wayne + 7 [mph] (ii) use (i) in (ii) => [...] speed_Dennis = 28 mph speed_Wayne = 21 mph
George
Let W be Wayne's speed in miles per hour and D be Dennis's speed in miles per hour. We know that W + 7 = D and W * 2 = D * 1.5. Substituting the first equation into the second: W * 2 = (W + 7) * 1.5 W * 2 = W * 1.5 + 7 * 1.5 0.5 * W = 7 * 1.5 W = 7 * 3 or 21 W is 21 D = W + 7 D = 21 + 7 D = 28
Salma
Devon is 32 32​​ years older than his son, Milan. The sum of both their ages is 54 54​. Using the variables d d​ and m m​ to represent the ages of Devon and Milan, respectively, write a system of equations to describe this situation. Enter the equations below, separated by a comma.
Aaron Reply
find product (-6m+6) ( 3m²+4m-3)
SIMRAN Reply
-42m²+60m-18
Salma
what is the solution
bill
how did you arrive at this answer?
bill
-24m+3+3mÁ^2
Susan
i really want to learn
Amira
I only got 42 the rest i don't know how to solve it. Please i need help from anyone to help me improve my solving mathematics please
Amira
Hw did u arrive to this answer.
Aphelele
hi
Bajemah
-6m(3mA²+4m-3)+6(3mA²+4m-3) =-18m²A²-24m²+18m+18mA²+24m-18 Rearrange like items -18m²A²-24m²+42m+18A²-18
Salma
complete the table of valuesfor each given equatio then graph. 1.x+2y=3
Jovelyn Reply
x=3-2y
Salma
y=x+3/2
Salma
Hi
Enock
given that (7x-5):(2+4x)=8:7find the value of x
Nandala
3x-12y=18
Kelvin
please why isn't that the 0is in ten thousand place
Grace Reply
please why is it that the 0is in the place of ten thousand
Grace
Send the example to me here and let me see
Stephen
A meditation garden is in the shape of a right triangle, with one leg 7 feet. The length of the hypotenuse is one more than the length of one of the other legs. Find the lengths of the hypotenuse and the other leg
Marry Reply
how far
Abubakar
cool u
Enock
state in which quadrant or on which axis each of the following angles given measure. in standard position would lie 89°
Abegail Reply
hello
BenJay
hi
Method
I am eliacin, I need your help in maths
Rood
how can I help
Sir
hmm can we speak here?
Amoon
however, may I ask you some questions about Algarba?
Amoon
hi
Enock
what the last part of the problem mean?
Roger
The Jones family took a 15 mile canoe ride down the Indian River in three hours. After lunch, the return trip back up the river took five hours. Find the rate, in mph, of the canoe in still water and the rate of the current.
cameron Reply
Shakir works at a computer store. His weekly pay will be either a fixed amount, $925, or $500 plus 12% of his total sales. How much should his total sales be for his variable pay option to exceed the fixed amount of $925.
mahnoor Reply
I'm guessing, but it's somewhere around $4335.00 I think
Lewis
12% of sales will need to exceed 925 - 500, or 425 to exceed fixed amount option. What amount of sales does that equal? 425 ÷ (12÷100) = 3541.67. So the answer is sales greater than 3541.67. Check: Sales = 3542 Commission 12%=425.04 Pay = 500 + 425.04 = 925.04. 925.04 > 925.00
Munster
difference between rational and irrational numbers
Arundhati Reply
When traveling to Great Britain, Bethany exchanged $602 US dollars into £515 British pounds. How many pounds did she receive for each US dollar?
Jakoiya Reply
how to reduced echelon form
Solomon Reply
Jazmine trained for 3 hours on Saturday. She ran 8 miles and then biked 24 miles. Her biking speed is 4 mph faster than her running speed. What is her running speed?
Zack Reply
d=r×t the equation would be 8/r+24/r+4=3 worked out
Sheirtina
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Source:  OpenStax, Wiskunde graad 7. OpenStax CNX. Oct 21, 2009 Download for free at http://cnx.org/content/col11076/1.2
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