91�ȱ�

Ffocws dysgu

Dysga mai amryw o rannau sy’n creu rhif cyfan yw ffracsiynau.

Mae'r wers hon yn cynnwys:

• un fideo
• dau weithgaredd

Learning focus

Learn to recognise fractions that are several parts of a whole.

This lesson includes:

• one video
• two activities

Fideo / Video

Mae gofodwr yn dangos sut i adio ffracsiynau.

An astronaut shows how to add fractions.

Nodiadau i rieni

Ar ôl gwylio'r fideo, dylai'r disgyblion wybod:

• mai enwadur yw enw'r rhif ar waelod ffracsiwn
• bod angen i'r enwadur fod yr un peth er mwyn adio ffracsiynau
• bod modd adio ffracsiynau gyda'r un enwadur

Notes for parents

After watching the video, students should know:

• that the number at the bottom of a fraction is called the denominator
• that the denominator needs to be the same to add fractions
• that fractions with the same denominator can be added

Adio ffracsiynau

Enwaduron cyffredin

Mae’n hawdd adio a thynnu ffracsiynau pan fydd y rhifau o dan y llinell yr un fath.

Yr enwadur yw’r rhif o dan y llinell.

Adding fractions

Common denominators

It's easy to add and subtract fractions when the numbers under the line are the same.

The denominator is the number under the line.

Gweithgaredd 1 / Activity 1

Adia’r ffracsiynau.

Add the fractions.

Gweithgaredd 2 / Activity 2

Adia’r ffracsiynau isod.

Add the fractions below.

1. ⅕ + ⅖ =

2. ⅓ + ⅓ =

3. ²⁄₇ + ³⁄₇=

4. ¼ + ²⁄₄ =

5. ⅗ + ⅖ =