Question

Express the following decimal numbers in an expanded form.

(i) 354.563

(ii) 123.321

Answer 1

(i) 354.563 = 300 + 50 + 4 + $\frac{5}{10}$ + $\frac{6}{100}$ + $\frac{3}{1000}$ = 3 x 100 + 5 x 10 + 4 x 1 + 5 x $\frac{1}{10}$ + 6 x $\frac{1}{100}$ + 3 x $\frac{1}{1000}$ ( 1 mark )

(ii) 123.321 = 100 + 20 + 3 + $\frac{3}{10}$ + $\frac{2}{100}$ + $\frac{1}{1000}$ = 1 x 100 + 2 x 10 + 3 x 1 + 3 x $\frac{1}{10}$ + 2 x $\frac{1}{100}$ + 1 x $\frac{1}{1000}$ ( 1 mark )