Niferoedd
Rhifau: Sut i ddweud- Ffracsiynau, Diffygion, sero, Cyfrifiadau llafar ...
Rhifau Cardinal
0 sero 1 un 2 dau 3 tri
4 pedwar 5 pump 6 chwech 7 saith
8 wyth 9 naw 10 deg 11 ar ddeg
12 deuddeg 13 deg tri 14 pedwar ar ddeg 15 pymtheg
16 un ar bymtheg 17 ar bymtheg 18 deunaw 19 ar bymtheg
20 ugain 21 un ar hugain 22 twenty-two 30 thirty
40 deugain 50 hanner deg 60 sixty 70 seventy
80 wyth deg 90 naw deg 100 cant
101 cant (ac) un
102 cant (a) dau 1,000 mil
10,000 deg mil 100,000 un cant mil
1,000,000 un miliwn 1,000,000,000 un biliwn
Rhifau Ordinalol
1st cyntaf 2nd ail 3rd trydydd 4fed pedwerydd 5fed pumed
6th chweched 7th seithfed 8th wythfed 9th nawfed 10th degfed
11th eleventh 12th twelfth 13th thirteenth 14th bedwareddenthth
15th fifteenth 16th sixteenth 17th seventeenth 18th ddeunawfed
19th bedwaredd ganrif ar bymtheg 20fed yr ugeinfed ar hugain 21st ar hugain ar hugain 22nd ar hugain ar hugain
30th 40th hugain rhan o ddeugain 50th hanner canfed 60th drigain oed 70th yn ddeg a thrigain
80th eightieth 90th ninetieth 100th un cantfed
101st cant (a) cyntaf 102nd cant (a) eiliad
1,000th un milfedfed 10,000th deg milfed 100,000th cant milth
1,000,000fed un miliwnfed 1,000,000,000fed un biliwnfed
1, 3, 5, 7, ac ati rhifau rhyfedd
2, 4, 6, 8, ac ati rhifau hyd yn oed
+ mwy
- minws
x gwaith
/ wedi'i rannu gan
= yn gyfartal
| 1 un 2 dau 3 tri 4 pedwar Ewyllys 5 6 chwech 7 saith 8 wyth 9 naw 10 deg |
11 ar ddeg 12 deuddeg 13 tri ar ddeg 14 pedwar ar ddeg 15 pymtheg 16 un ar bymtheg 17 ar bymtheg 18 deunaw 19 ar bymtheg 20 ugain |
| 21 un ar hugain 22 ugain 30 ar hugain 40 deugain 50 hanner cant 60 chwe deg 70 saith deg 80 wyth deg 90 naw deg 100 a / cant |
101 a / cant ac un 140 a / cant a deugain 200 dau gant na dau gannoedd 1,000 a / mil 1,050 a / mil a hanner cant 1,250 a / mil dau gant a hanner 2,000 dwy fil 100,000 a / cant cant 1,000,000 a / un miliwn 2,000,000 ddwy filiwn ddim dwy filiwn |
Mewn niferoedd mawr (dros 999), ysgrifennwch goma (,) rhwng miloedd a channoedd, ee 11,000, a rhwng miliynau a miloedd, ee 3,000,000.