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Defnyddiwch y ffaith fod 28 x 49 = 1372 i ysgrifennu'r atebion i'r canlynol. Use the fact that 28 x 49 = 1372 to write down the answers to the following (a) 2.8 x 4.9 =. (b) 14 x 490 = . (c) 137.2 49 =. 2. Darganfyddwch werth Find the value of(a) 5 x 2,. (b) 28.6 12.73. 13.72. 6
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