# the history of telephone

May 15th, 2015
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A telephone, or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are not in the same vicinity of each other to be heard directly. A telephone converts sound, typically and most efficiently the human voice

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math 2Revision1- Find:a-b-c-5 28980 206+ 12 352+e-396+ 5 193....75 891d7 316+g90 000- 15 3922- Put ( ) or ( ):+ 2 751- 5 362f-2 163841h24 05935 7527 830- 24 534-a- The place value of 0 in 70 981 is 0()b- 700 Hundreds = 7 Thousands()c- 2 159 + 999 = 9 999 + 2 159()d- 20 000 is greater than 19 999()e- 3 + 90 + 700 + 50 000 = 5 793()13- Complete:a- 9 354 is read as b- Eighty thousand and eight = c- 5 Th , 2 H , 3 T , 9 U = d- The value of 2 in 82 888 is e- 7 425 = Th, H, T, U f- 93 567 = H, Th, T, U g- 53 Th , 2 H , 5 U = h- 7 158 = + + + i- 32 501 = + = + + +

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