

Cymarebau
Presentation
•
Mathematics
•
7th - 9th Grade
•
Medium
Gruffydd Davies
Used 4+ times
FREE Resource
8 Slides • 4 Questions
1
Cymarebau

2
Nod y wers
I ddeall beth yw cymarebau a sut i'w ddefnyddio.
3
Beth yw cymhareb?
Mae cymhareb yn cymharu maint dau neu fwy rhan o rywbeth.
4
Er enghraifft
Os mae 12 bachgen ac 15 merch mewn dosbarth, y gymhareb o fechgyn i ferched yw 12 i 15.
5
Sut ydyn ni'n ysgrifennu cymarebau?
Pan rydym yn ysgrifennu cymarebau mas, rydym yn defnyddio'r symbol yma...
6
Nôl i'r enghraifft blaenorol...
Gallwn ysgrifennu'r cymhareb o 12 bachgen i 15 merch sydd yn y dosbarth fel...
7
Enghraifft 2
Mae 3 pêl coch a 7 pêl glas mewn bag, beth yw'r cymhareb o beli coch i beli glas?
8
9
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
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
11
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
12
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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