3/4hm=3/40km
5/12 phút=25/36 giờ
3/8tan=15/4 tạ
3/4 hm = 3/40 km
5/12 phút = 1/144 giờ
3/8 tấn = 15/4 tạ
Bài 1:Điền số;dấu >,<,=;hoặc đơn vị đo thích hợp vào .....
Câu 1:10375181 mm=.....km.....hm.....dam.....m.....dm.....cm.....mm;
Câu 2:3703518 cm=.....hm.....m.....dm.....mm;
Câu 3:700000 dm.....700 km;
Câu 4:27 km 27m.....2727 dam;
Câu 5:\(\frac{3}{8}km.....\frac{2}{5}hm.\)
Câu 6:\(\frac{9}{4}m.....\frac{90}{40000}mm.\)
Câu 7:\(\frac{3}{125}dam....\frac{4}{5}cm.\)
Câu 8:50000.....=500.....;
Câu 9:\(\frac{1}{5}.....=200.....;\)
Câu 10:\(.....dam=\frac{3}{4}km.\)
viet so thich hop vao cho cham
5 ta 8 yen = .....yen 2 gio = .......phut
\(\frac{4}{5}\)km2 = .........m2 2phut 6 giay = ...........giay
bài 1 : tính phân số:
a) \(\frac{5}{7}+\frac{4}{9}=?;\frac{4}{5}-\frac{2}{3}=?;\frac{9}{11}+\frac{3}{8}=?;\frac{16}{25}-\frac{2}{5}=?\)=?
b)\(5+\frac{3}{5}=?;10-\frac{9}{16}=?;\frac{2}{3}-\left(\frac{1}{6}+\frac{1}{8}\right)=?\)
c)\(\frac{5}{7}+\frac{7}{6}=?;\frac{7}{12}+\frac{17}{18}=?;\frac{9}{8}+\frac{15}{32}=?;4+\frac{35}{45}=?\)
d)\(\frac{11}{4}-\frac{15}{16}=?;\frac{5}{6}-\frac{5}{8}=?;\frac{196}{64}-2=?;3-\frac{13}{9}=?\)
e)\(\frac{8}{5}+\frac{7}{6}+\frac{5}{9}-2=?;3-\frac{5}{6}-\frac{4}{9}+\frac{32}{24}=?\)
2 tan 347 kg = .........kg 4215 kg = ....tan .......kg
4 tan 5 kg = ..........kg 659 kg = .......ta ........kg
\(\frac{3}{5}m^2=....cm^2\) \(\frac{4}{5}km^2=........m^2\) 2 gio 15 phut = ........phut \(\frac{2}{5}phut=...........giay\)
12 ta 4 yen = ........yen 46723 g = .......kg .......g
\(\frac{3}{4}+\frac{7}{8}\)=.........................................
\(\frac{12}{3}-\frac{5}{12}\)=....................................
tim x biet
a\(\frac{3}{5}:\frac{7}{x}:\frac{3}{4}=\frac{8}{35}\)
b,\(x< \frac{7}{12}:\frac{4}{5}\)
2 . tính
\(\frac{12}{5}-\frac{4}{5}=\)
\(\frac{11}{6}-\frac{2}{3}=\)
\(\frac{7}{8}-\frac{2}{7}=\)
3 . tính theo mẫu : Mẫu : 2\(-\frac{3}{2}=\frac{4}{2}-\frac{3}{2}=\frac{1}{2}\)
\(4-\frac{8}{5}=\)
\(2-\frac{3}{8}=\)
\(\frac{16}{7}-2=\)
\(\frac{25}{4}-3=\)
2 tan 5 ta = 2005 kg 1/3 gio ....<.... 30 phut 8m2 99dm2 <.4m2 24 nam ....>.. 1/4 the ki dien chu d vao o dung va chu s vao o sai
tính nhanh :
\(\frac{1}{2}+\frac{2}{4}+\frac{3}{6}+\frac{4}{8}+\frac{5}{10}+\frac{6}{12}=?\)
