Cau 2:
a: 1/3+1/4=4/12+3/12=7/12
b: 3/5-2/7=21/35-10/35=11/35
câu 1 :
16m 75 mm = 16,0075 m
28ha = 0,28 km^2
câu 2 :
1/3 + 1/4 = 4/12 + 3/12 = 7/12
3/5 - 2/7 = 21/35 - 6/35 = 11/35
16m 75mm= 16\(\dfrac{75}{1000}\) m
28ha= \(\dfrac{28}{100}\) km2
\(\dfrac{1}{3}+\dfrac{1}{4}\)= \(\dfrac{7}{12}\)
\(\dfrac{3}{5}-\dfrac{2}{7}=\dfrac{11}{35}\)
câu 1
\(16m75mm=16,075m\)
\(28ha=0,28m^2\)
câu 2
\(\dfrac{1}{3}+\dfrac{1}{4}=\dfrac{4}{12}+\dfrac{3}{12}=\dfrac{7}{12}\)
\(\dfrac{3}{5}-\dfrac{2}{7}=\dfrac{21}{35}-\dfrac{10}{35}=\dfrac{11}{35}\)
câu 1: \(16m75mm=16,075m\)
\(28ha=0,28km^2\)
câu 2: \(\dfrac{1}{3}+\dfrac{1}{4}=\dfrac{4}{12}+\dfrac{3}{12}=\dfrac{7}{12}\)
\(\dfrac{3}{5}-\dfrac{2}{7}=\dfrac{21}{35}-\dfrac{10}{35}=\dfrac{11}{35}\)
câu 1 : 16m75mm = 16,0075 m
28ha = 0,28km2
câu 2: 1/3 +1/4 =4/12+3/12 = 7/12
3/5 - 2/7 = 21/35-10/35=11/35
