One half square meter = () square decimeter, three tenths of a ton = () kilogram, three fourths of a hour = () minute, four fifths of a second = () 10 × 7 / 15=

Half square meter = (50) square decimeter
Three tenths of a ton = (300) kg
3 / 4 = (45)
Four fifths = (48) seconds
10 × 7 / 15 = 14 / 3

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