( 1+9)×9÷2=45
45÷ 10=4.5
Divide two 3-meter-long ropes into 5 and 7 segments on average, and the difference between each segment is (6/35) meters. (expressed in fractions)
Two pots of oil, A and B. A weighs 7/4, which is lighter than B. 1/4 ... How many kilograms are the two pots of oil A and B?
7/4 ÷ (1- 1/4) = 2 and 1/3 (kg)
7/4+2 and 1/3 = 4 and112 (kg)