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Seven and eight tenths can be written as 7.8 in decimal notation.
Expressed as a decimal fraction, 7 and 8 tenths is equal to 7.8.
1 and 8 tenths as a decimal is 1.8
.8
0.8
8.4
2,000.8
8.4
0.008
8 and 4 tents = 8.4 in decimal.
8.4 is 8 and 4/10
1 and 8/10 = 1.8