S.chand publication New Learning Composite mathematics solution of class 7 Chapter 2 Fractions and Decimals Exercise 2L

 Exercise 2L

Convert:

Question 1

(a) 3 km = How many meter

Sol : = (3×1000)m=3000m

(b) 2 m = How many centimeter

Sol : = (2×100)cm=200cm

(c) 5 cm = How many milimeter

Sol : (5×10)mm=50mm

(d) 2.9 m = How many centimeter

Sol : (2.9×100)cm=290cm

(e) 0.89 km = How many meter

Sol : (0.89×1000)m=890m

(f) 0.3 m = How many milimeter

Sol : (0.3×1000)mm=300mm

(g) 7 dam = How many meter

Sol : (7×10)m=70m

(h) 5 hm = How many meter

Sol : (5×100)m=500m

(i) 2 m = How many decemeter.

Sol : (2×10)dm=20dm

Question 2

(a) 478 cm = How many meter

Sol : $=\frac{478}{100}$m=4.78m

(b) 3209 centimeter = How many meter

Sol : $=\frac{3209}{100}$ m

(c) 90 milimeter = How many how many centimeter.

Sol : $=\frac{9}{10}$cm=0.9cm

(d) 49 meter = How many kilometer.

Sol : $=\frac{49}{1000}$km==0.049km

(e) 2000 m = How many kilometer

Sol : $=\frac{2000}{1000}$km=2km

(f) 200 cm = How many meter.

Sol : $=\frac{200}{100}$m=2m

(g) 428 milimeter = How many meter

Sol : $=\frac{428}{1000}$m=0.428m

(h) 3 milimeter = how many meter

Sol : $=\frac{3}{1000}$m=0.003m

(i) 8 dacemeter = How many kilometer.

Sol : $=\frac{8}{100}km$=0.08km

Question 3

(a) 5 kg = How many gram

Sol : (5×1000)g=5000

(b) 3.7 kg = How many gram

Sol : (3.7×1000)g=3700

(c) 0.289 kg = How many gram

Sol : (0.289×1000)g=289

(d) 3.59 g = How many miligram

Sol : (3.59×1000)g=3590

(e) 9 g = How many miligram.

Sol : (9×1000)g=9000

(f) 0.05 g = How many miligram.

Sol : (0.05×1000)g=50

(g) 2 q = How many kilogram

Sol : (2×100)kg=200kg

(h) 2.9 t = how many kilogram

Sol : (2.9×1000)kg=2900kg

(i) 0.032 kg = How many gram

Sol : (0.032×1000)g=32g

Question 4

(a) 4000 g = How many kilogram

Sol : $=\frac{4000}{1000}$kg=4kg

(b) 1800 gram = How many kilogram.

Sol : $=\frac{1800}{1000}$kg=1.8kg

(c) 46 g = How many kilogram

Sol : $\frac{46}{1000}$kg

(d) 729 mg = How many gram.

Sol : $\frac{729}{1000}$kg=0.729g

(e) 700 mg = How many gram.

Sol : $=\frac{700}{1000}$g=0.7g

(f) 67 mg = How many gram.

Sol : $=\frac{67}{1000}$g=0.067g

(g) 8 mg = How many gram

Sol : $=\frac{8}{1000}$g=0.008g

(h) 9 g = How many kilogram

Sol : $=\frac{9}{1000}$kg=0.009kg

(i) 2 cg = How many miligram.

Sol : (2×10)mg=20

Question 5

(a) 4 hg = How many gram.

Sol : (4×100)g=400g

(b) 1.9 km = How many decemeter.

Sol : (1.9×10000)g=19000g

(c) 8.3 decagram = How many dg.

Sol : (8.3×100)dg=830dg

(d) 75 dam = How many kilometer

Sol : $=\frac{75}{100}$km=0.75km

(e) 4 dg = How many miligram

Sol : =(4×100)mg=400mg

(f) 300 kg = How many quintal.

Sol : $=\frac{300}{100}$q=3q

Question 6

Compare and put <,> or == in the given boxes.

(a) 5,000 mm ____ 5 m

Sol : 5,000 mm = 5 m

(b) 3.8 kg ____ 400 g

Sol : 3.8 kg > 400 g

(c) 5 mg ____ 1 g

Sol : 5 mg < 1 g

(d) 3 g ____ 30,000 mg

Sol : 3 g < 30,000 mg

(e) 0.0087 m ____ 8.7 mm

Sol : 0.0087 m = 8.7 mm

(f) 0.2 km ____ 2000 mm

Sol : 0.2 km > 2000 mm