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Datrys hafaliadau syml

Datrys hafaliadau syml. ? = 5. ? + 6 = 11. ? + 6 = 11. Gweithio lawr y tudalen. ? = 11 - 6. ? = 5. x + 6.34 = 11.1. x + 6.34 = 11.1. x = 11.1 – 6.34. Gweithio lawr y tudalen. x = 4.76. t – 4.12 = 1.23. t – 4.12 = 1.23. t = 1.23 + 4.12. Gweithio lawr y tudalen. t = 5.35.

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Datrys hafaliadau syml

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  1. Datrys hafaliadau syml

  2. ? = 5 ? + 6 = 11 ? + 6 = 11 Gweithio lawr y tudalen. ? = 11 - 6 ? = 5

  3. x + 6.34 = 11.1 x + 6.34 = 11.1 x = 11.1 – 6.34 Gweithio lawr y tudalen. x = 4.76

  4. t – 4.12 = 1.23 t – 4.12 = 1.23 t = 1.23 + 4.12 Gweithio lawr y tudalen. t = 5.35

  5. 3x = 9.36 3x = 9.36 x = 9.36 ÷ 3 Gweithio lawr y tudalen. x = 3.12

  6. 4.2y = 12.6 4.2y = 12.6 y = 12.6 ÷ 4.2 Gweithio lawr y tudalen. y = 3

  7. Gweithio lawr y tudalen.

  8. Gweithio lawr y tudalen.

  9. 6z + 7 = 25 6z + 7 = 25 6z = 25 - 7 6z = 18 6z = 18 Gweithio lawr y tudalen. z = 18 ÷ 6 z = 3

  10. 2a + 3 = 7 2a + 3 = 7 2a = 7 - 3 2a = 4 2a = 4 Gweithio lawr y tudalen. a = 4 ÷ 2 a = 2

  11. 5y - 4 = 41 5y - 4 = 41 5y = 41 + 4 Gweithio lawr y tudalen. 5y = 45 5y = 45 y = 45 ÷ 5 y = 9

  12. 3c + 5 = c + 15 3c + 5 = c + 15 3c - c = 15 – 5 2c = 10 2c = 10 Gweithio lawr y tudalen. c = 10 ÷ 2 c = 5

  13. 2d - 6 = 14 - 3d 2d - 6 = 14 - 3d 2d + 3d = 14 + 6 Gweithio lawr y tudalen. 5d = 20 5d = 20 d = 20 ÷ 5 d = 4

  14. 20 - 5e = 14 - 2e 20 - 5e = 14 - 2e 20 - 14 = - 2e + 5e 6 = 3e 6 = 3e Gweithio lawr y tudalen. 6 ÷ 3 = e 2 = e

  15. 2(x – 1) 2(x – 1) 2(x – 1) 2× x + 2× - 1 Gweithio lawr y tudalen. 2x – 2

  16. 5(2x + 1) 5(2x + 1) 5(2x + 1) 5× 2x + 5× 1 Gweithio lawr y tudalen. 10x + 5

  17. 3(b + 2) = 15 3b + 6 = 15 Gweithio lawr y tudalen. 3b = 9 b = 3

  18. 2(c - 6) = 10 2c - 12 = 10 Gweithio lawr y tudalen. 2c = 22 c = 11

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