Cymarebau

Presentation

•

Mathematics

•

7th - 9th Grade

•

Medium

Gruffydd Davies

Used 4+ times

FREE Resource

8 Slides • 4 Questions

Cymarebau

Nod y wers

I ddeall beth yw cymarebau a sut i'w ddefnyddio.

Beth yw cymhareb?

Mae cymhareb yn cymharu maint dau neu fwy rhan o rywbeth.

Er enghraifft

Os mae 12 bachgen ac 15 merch mewn dosbarth, y gymhareb o fechgyn i ferched yw 12 i 15.

Sut ydyn ni'n ysgrifennu cymarebau?

Pan rydym yn ysgrifennu cymarebau mas, rydym yn defnyddio'r symbol yma...

Nôl i'r enghraifft blaenorol...

Gallwn ysgrifennu'r cymhareb o 12 bachgen i 15 merch sydd yn y dosbarth fel...

Enghraifft 2

Mae 3 pêl coch a 7 pêl glas mewn bag, beth yw'r cymhareb o beli coch i beli glas?

Multiple Choice

Mae yna 13 bachgen a 10 merch mewn dosbarth. Beth yw'r cymhareb o fechgyn i ferched?

10:13

23:13

13:10

23:10

Multiple Choice

Mae gan siop anifeiliaid anwes 4 ci a 9 cath. Beth yw'r cymhareb o gwn i gathod?

4:9

9:4

13:9

4:13

Multiple Choice

Mae bag o farblys (marbles) yn dod â 2 marblen coch, 3 marblen glas a 5 marblen melyn. Beth yw'r cymhareb o farblys coch i farblys melyn?

2:5

5:3

3:5

5:2

Multiple Choice

Os mae yna 5 chwaraewr pêl-droed, 10 chwaraewr pêl-fas ac 15 chwaraewr pêl- fasged, beth yw'r cymhareb o chwaraewyr pêl-fas i chwaraewyr pêl-droed?

5:10

5:15

10:5

15:5

Cymarebau

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