کدام تساوی درست است؟
1 )
$(9\times \frac{1}{10})\ +\ (5\times \frac{1}{1000})\ =\ \frac{9}{10}\ +\ \frac{5}{100}\ =\ 0/9\ +\ 0/05\ =\ 0/95$
2 )
$(9\times \frac{1}{10})\ +\ (5\times \frac{1}{1000})\ =\ \frac{9}{100}\ +\ \frac{5}{1000}\ =\ 0/09\ +\ 0/005\ =\ 0/095$
$(9\times \frac{1}{10})\ +\ (5\times \frac{1}{1000})\ =\ \frac{9}{10}\ +\ \frac{5}{1000}\ =\ 0/9\ +\ 0/005\ =\ 0/905$
4 )
$(9\times \frac{1}{10})\ +\ (5\times \frac{1}{1000})\ =\ \frac{9}{10}\ +\ \frac{5}{1000}\ =\ 0/09\ +\ 0/05\ =\ 0/905$