chieu rong manh vuon la:

12x2/3=8(m)

dien tich manh vuon la:

12x8=96(m)

So ki-lo-gam la:

96x9=864(kg)

Dap so:864kg

a)20x3246x5 b)346x53+346x47

=(20x5)x3246 =346x(53+47)

=100x3246 =346x100

=324600 =34600

a)Ban Duc la nguoi da xem nhieu tran dau nhat va ban xem 7 tran

b)Ban Do la nguoi da xem it tran dau nhat va ban xem 5 tran

c)Trung binh moi ban xem 6 tran bong

1/2tan= 400yen

2/5m= 3000cm

7/12gio< 40phut

1/4km= 250m

a)7/24+13/6=59/24

b)12/49-1/7=5/49

c)5/8x24/25=3/5

d)38/21;19/3=2/7

34287 557130:42=13265

65

1920072