Embedded Files
Gwerth lle / Place Value
Nodwch werth y digid sydd wedi ei danlinellu yn y rhifau isod:
Write down the value of the digits underlined in the numbers below:
1021 3012 8229 27 589
60 542 74 133 99 999 150 500
Ysgrifennwch y rhifau isod mewn geiriau. / Write the numbers below in words.
367 2894 1099 75 000 100 000
Cliciwch ar y linc er mwyn chwarae’r gêm gwerth lle. Medrwch ddewis eich lefel i’w wneud yn haws neu’n galetach. / Click on the link to play the place value game. You can choose your level to make it easier or harder.
Haneru a Dyblu / Halving and Doubling
Hanerwch y rhifau isod gan ddefnyddio'r dull dosrannu. / Halve the numbers below by using the partition method.
230,950 1436 2654 18 228
32,600 40,944 50 820 84,262
Dyblwch y rhifau isod. / Double the numbers below:
133 450 2041 5500
6321 26 364 37, 450
Adio gan ddefnyddio'r dull colofnau / Addition using the columns method
Cwblhewch y symiau isod gan adio mewn
colofnau. / Complete the sums by using the column method.
1). 597 + 597 =
2). 7777 + 4253 =
3). 84 952 + 19 200 =
4). 125 531 + 299 600 =
5). 378 929 + 378 929 =
6). 712 888 + 542 999 =
Cliciwch ar y linc er mwyn chwarae’r gêm adio. Gallwch ddewis eich lefel i’w wneud yn haws neu’n galetach. / Click on the link to play the addition. You can choose your level to make it easier or harder.
Ffactorau / Factors
Rhifau sy’n rhannu i mewn i rif arall yn union (heb weddill) yw ffactor e.e. ffactorau 8 yw 1, 2, 4 ac 8. Beth yw ffactorau y rhifau isod? / A factor is a number that divides into another number exactly (without a remainder) e.g. the factors of 8 are 1, 2, 4 and 8. What are the factors of the numbers below?
Talgrynnu i’r 10 agosaf / Rounding to the nearest 10
Os yw’r unedau’n 5 neu fwy, talgrynnwch i fyny. Os yw’r unedau’n 4 neu lai, talgrynnwch i lawr. / If the units are 5 or above, round up. If the units are 4 or less, round down.
E.e. 356 = talgrynnu i fyny i 360.
Talgrynnwch y rhifau isod i’r 10 agosaf / Round the numbers to the nearest 10
16 / 23 / 348 / 292 / 4565
Talgrynnu i’r 100 agosaf / Rounding to the nearest 100
Os yw’r degau’n 5 neu fwy, talgrynnwch i fyny. Os yw’r degau’n 4 neu lai, talgrynnawch i lawr. / If the tens are 5 or above, round up. If the tens are 4 or less, round down.
e.e. 3281 = talgrynnu i fyny i 3300.
Talgrynnwch y rhifau isod i’r 100 agosaf / Round the numbers to the nearest 100
292 / 648 / 329 / 550 / 1565
Beth am ymarfer eich sgiliau talgrynnu wrth chwarae'r gêm? / How about practising your rounding skills by playing the game?
Rhannu / Division
Cliciwch ar y linc isod er mwyn chwarae’r gêm ddymchwel i ymarfer eich sgiliau rhannu. Beth am chwarae yn erbyn aelod o’r teulu neu ffrind? /
Click on the link below to play the demolition game to practise your division skills. Why not play against a family member or friend?
Arian – Cyfrifo Newid / Money - Calculating Change
Beth yw’r newid o £1, £5, £10?
Gallwn gyfrifo newid gan dynnu, e.e. £1 - 70c. / What is the change from £1, £5 and £10?
Change can be calculated by subtracting, i.e. £1-70p
£1 £5 £20
70c £2.50 £16.50
38c £3.79 £19.30
62c £1.98 £12.45
25c £4.12 £7.99
Canrannau / Percentages
Darganfyddwch ganrannau. Dewiswch un set i’w cwblhau neu gwblhewch bob un os hoffech. / Discover percentages. Choose an option to complete or complete each one, if you wish.
Dilyniannau Rhif / Number Sequences
Copïwch a chwblhewch y dilyniannau rhif isod. Dewiswch un set i’w gwblhau neu gwblhewch bob un os hoffech. / Copy and complete the number sequences below. Choose an option or complete each one, if you wish.
Opsiwn 1 / Option 1
1)2, 4, 6, __, __, __
2)0, 5, 10, __, __, __
3)10, 20, 30, __, __, __
4)4, 8, 12, __, __, __
5)11, 22, 33, __, __, __
6)8, 18, 28,
7)24, 34, 44, __, __, __
8)3, 6, 9, __, __, __
Opsiwn 2 / Option 2
1)12, 23, 34, __, __, __
2)2, 8, 14, 20, __, __, __
3)33, 29, 25, 21, __, __, __
4)6, 12, 18, __, __, __
5)9, 18, 27, __, __, __
6)3, 15, 27, __, __, __
7)3, 23 , 43, __, __, __
8)50, 48, 46, __, __, __
Opsiwn 3 / Option 3
1) 1.2, 2.4, 3.6, __, __, __
2) - 9, -7, -5, __, __, __
3) 8, 16, 32, __, __, __
4) 56, 48, 40, __, __, __
5)66, 56, 47, 39, 32, __, __, __
6)1.0, 1.5, 2.0, __, __, __
7)8, 16 , 24, __, __, __
8)20, 30, 29, 39, 38, __, __, __
Amser / Time
Troswch yr amseroedd isod o gloc 12 awr i gloc 24 awr. Cofiwch bod rhaid i gloc 24 awr gael 4 digid. / Convert the times below from a 12 hour clock to a 24 hour clock. Remember that a 24 hour clock must have 4 digits.
Lluosi a rhannu gyda 10, 100 a 1000./ Multiplying and dividing by 10, 100 and 1000
Lluoswch y rhifau hyn gyda 10, 100 a 1000: 31 / 2.3 / 0.4 / 54.1 / 4.3 / 0.05
Rhannwch y rhifau hyn gyda 10, 100 a 1000: 23 / 654 / 1500 / 1.3 / 0.1 / 0.12
Darllen yr amser / Telling the time
Ymarferwch ddarllen clociau. / Practise telling the time.
Rhannu / Division
Dewiswch set o gwestiynau i’w cwblhau. / Choose a set of questions to answer.
Cofiwch i ddefnyddio’r dull rhannu i’ch helpu. / Remember to use the division method to help you.
Dewiswch set o gwestiynau i gwblhau / Choose a set of questions to answer
Ffracsiynau, degolion a chanrannau / Fractions, decimals and percentages
Dewch i gyfateb ffracsiynau, degolion a chanrannau. Cliciwch ar y linc isod / Match the fractions, decimals and percentages.
Gweithred gwrthdro / Inverse operations
Mae gweithrediadau gwrthdro yn ddefnyddiol ar gyfer gwirio eich cyfrifiadau. Gallwch ddefnyddio rhannu i wirio lluosi ac i'r gwrthwyneb. / Inverse operations are handy for checking your calculations. You can use division to check multiplication and vice versa.
1) 3 x 4 = 12 12 ÷ 3 = 4
2) 4 x 5 = ___ ____ ÷ ____ = 5
3) 6 x 4 = ___ ____ ÷ ____ = 4
4) 7 x 8 = ___ ____ ÷ ____ = 7
5) 7 x ___ = ___ 49 ÷ ____ = 7
6) 6 x ___ = ___ ____ ÷ 7 = 6
7) 9 x ___ = 72 ____ ÷ ___ = 9
8) 8 x 5 = ___ ____ ÷ ____ = 8
Page updated
Report abuse