Đo lường khối lượng và diện tích

Write the units of mass below in the form of measurements with the unit km.

Write the appropriate number in the blanks: 2.539m = .... m ....dm....cm....mm = ....m....cm....mm = mm

Fill in the appropriate signs > < =: 5.8m........5.799m 0.2m....20cm 0.64m........6.5dm 9.3m 9m 3cm 4kg 20g....4.2kg 500g .... 0.5kg 1.8 tons .... 1 ton 8 kg 0.165 tons 16.5 tons 5 m2 8 dm2 .... 58 dm2 7 dm2 5cm2 ...... 710 cm2 910 hm2 ....91 km2 8 cm2 4 mm2 804/100 cm2

Write the following measurements in order from smallest to largest: 8.62m; 82.6dm; 8.597m; 860cm; 8m 6cm.

Write the appropriate number in the blanks: 8 dam2 = ....m2 20 hm2 = .... dam2 5 cm2 = mm2 3 m2 = ....cm2 7 hm2 = .... m2 13 km2 = hm2 300 m2 = .... dam2 2100 dam2 = ....hm2 900 mm2 = cm2 8000 dm2 = ....m2 50000 m2 = ....hm2 34000 hm2 = ....km2 1/10 hm2 = m2 3/5 hm2 =m2 1/10 km2 =hm2 1/2 km2 =hm2 8 m2 15 dm2 =dm2 35 cm2 12 mm2 =mm2 10 m2 7 dm2 =dm2 8 cm2 6 mm2 =mm2 5 dm2 23 cm2 =cm2 56 dm2 33 mm2 =mm2 a) 38 m2 25 dm2 =dm2 b) 198 cm2 = .... dm2cm2 15 dm2 9 cm2 =cm2 2080 dm2 = .... m2dm2 10 cm2 6 mm2 =mm2 3107 mm2 = .... cm2mm2 1 hm2 15 dam2 =m2 5427 dam2 = ....hm2dam2 12 km2 4 dam2 =m2 6027 hm2 =km2

How many pieces of wood are needed to cover a rectangular room with a length of 6m and a width of 4m using rectangular pieces of wood with a length of 1m 20cm and a width of 20cm?

How many rectangular wooden pieces with a length of 1m 20cm and a width of 20cm are needed to cover that room?

A rectangular field is planted with corn, with a width of 60 m and a length equal to 5/3 of the width. What is the area of that field? Knowing that, on average, 100 m2 yields 30 kg of corn. How many quintals of corn are harvested from the entire field?