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20⁰C = _______ .

If u_n+1=u_n+5 and u₁=3,then u₃=_______ .

100 m = ______ .

50⁰F = ______ .

Write 5.58 to one decimal place .

A centimetre is __________ part of a metre .

Round 78540 to the nearest 100 .

3.65 m = ________ .

The standard form of 600000 is ________ .