質問: Q1) Find i) 0.4\div2\ \ ii) 0.35\div5\ iii) 2.48\div4\ iv) 65.4\div6\ v) 651.2\div4\ vi) \ 14.49\div7\ vii) 3.96\div4\ \ viii) 0.80\div5 Q1) Find i) 0.4\div2\ \ ii) 0.35\div5\ iii) 2.48\div4\ iv) 65.4\div6\ v) 651.2\div4\ vi) \ 14.49\div7\ vii) 3.96\div4\ \ viii) 0.80\div5
回答: Solution 1 i) 0.4\div2\ \ = \frac{4}{10}\times\ \frac{1}{2}=\ \frac{2}{10}\ =\ 0.2 ii) 0.35\div5\ = \frac{35}{100}\ \frac{1}{5}=\frac{7}{100}=0.07 iii) 2.48\div4\ = \frac{248}{100}\ \times\frac{1}{4}\ =\ \frac{63}{100}=\ 0.62 iv) 65.4\div6\ = \frac{654}{10}\times\frac{1}{6}=\ \frac{109}{10}\ =10.9 v) 651.2\div4\ = \frac{6512}{10}\ \times\frac{1}{4}=\ \frac{1628}{10}=\ 162.8 vi) \ 14.49\div7\ = \frac{1449}{100\ }\times\frac{1}{7}=\ \frac{207}{100}\ =\ 2.07 vii) 3.96\div4\ \ =\frac{396}{100}\ \times\frac{1}{4}=\ \frac{99}{100}=0.99 viii) 0.80\div5 = \frac{80}{100}\ \times\frac{1}{5}=\frac{16}{100}=\ 0.16