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Tynnu

Tynnu. Cefnogaeth Mathemateg Blwyddyn 4. TYNNU COCH Cyfri Ymlaen OREN Dull byr GWYRDD Dull byr (benthyg). COCH Cyfri Ymlaen. 68. -. 34. =. 34. 68. 34. 6. 20. 8. 60. 40. Cyfrwch ymlaen at y deg agosaf. Neidiwch ymlaen i’r deg nesaf. 6. +. 20. +. 8. =. 34. COCH

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Tynnu

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  1. Tynnu Cefnogaeth Mathemateg Blwyddyn 4

  2. TYNNU COCH Cyfri Ymlaen OREN Dull byr GWYRDD Dull byr (benthyg)

  3. COCH Cyfri Ymlaen 68 - 34 = 34 68 34 6 20 8 60 40 Cyfrwch ymlaen at y deg agosaf. Neidiwch ymlaen i’r deg nesaf. 6 + 20 + 8 = 34

  4. COCH Cyfri Ymlaen 89 - 46 = 43 89 46 4 30 9 80 50 Cyfrwch ymlaen at y deg agosaf. Neidiwch ymlaen i’r deg nesaf. 4 + 30 + 9 = 43

  5. OREN Dull byr C D U 1 6 8 - 5 2 Cam 1: Gosodwch y rhif mwyaf uwchben y rhif lleiaf Cofiwch, y rhif uwchben (ar y top) tynnu’r rhif gwaelod! 1 1 6 Cam 2: 8 – 2 = 6 Cam 3: 6 – 5 = 1 Cam 4: 1 - 0 = 1

  6. GWYRDD Dull byr (benthyg) C D U 4 4 8 - 2 3 9 1 3 Cam 1: Gosodwch y rhif mwyaf uwchben y rhif lleiaf Cofiwch, y rhif uwchben (ar y top) tynnu’r rhif gwaelod! 9 2 0 Cam 2: 8 – 9 = methu gwneud gan bo 9 yn fwy nag 8 Cam 3: Benthyg o’r golofn nesaf. Cam 3: 18 = 9 = 9 Cam 4: 3 – 3 = 0 Cam 5: 4 - 2 = 2

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