1.2 Rhifau â seroau
Mae’r sero mewn rhif yn chwarae rhan bwysig iawn wrth benderfynu ei werth.
Ysgrifennir pedwar cant:
| C | D | U |
|---|---|---|
| 4 | 0 | 0 |
Mae angen inni roi i mewn y ddau sero i ddangos mai pedwar cant yw’r rhif, nid pedwar.
Ysgrifennir chwe chant a saith:
| C | D | U |
|---|---|---|
| 6 | 0 | 7 |
Mae arnom angen y sero i ddangos nad oes dim degau.
Activity 4.2 Gweithgaredd 2: Gwerth lle
Llenwch y blychau i ddangos gwerth pob rhif. Mae’r ddau gyntaf wedi’u gwneud ichi.
| Rhif | M | C | D | U |
|---|---|---|---|---|
| 584 | 5 | 8 | 4 | |
| 690 | 6 | 9 | 0 | |
| 708 | ||||
| 302 | ||||
| 4 290 | ||||
| 5 060 | ||||
| 2 100 | ||||
| 3 009 |
Interactive feature not available in single page view (see it in standard view).
Ateb
Mae’r atebion fel a ganlyn:
| Rhif | M | C | D | U |
|---|---|---|---|---|
| 584 | 5 | 8 | 4 | |
| 690 | 6 | 9 | 0 | |
| 708 | 7 | 0 | 8 | |
| 302 | 3 | 0 | 2 | |
| 4 290 | 4 | 2 | 9 | 0 |
| 5 060 | 5 | 0 | 6 | 0 |
| 2 100 | 2 | 1 | 0 | 0 |
| 3 009 | 3 | 0 | 0 | 9 |