Practice the math worksheet on third grade measurement of length. We know, there are three main standard units of length, i.e., kilometer (km), meter (m) and centimeter (cm). The relation between these units will help us to solve different types of problems on measuring length.

**1. Fill in the blanks:**

(i) 1 km = _________ m

(ii) 1 m = _________ cm

(iii) 1 dm = _________ cm

(iv) 1 m = _________ dm

(v) 1 km = _________ cm

**2. Choose the right answer:**

(i) Rachel measured a pencil in …………… (cm / m)

(ii) Distance between city A and city B is measured in …………… (m / km)

(iii) 5 m is equal to …………… cm (500 / 50)

(iv) A tailor uses a …………… to measure the cloth (ruler, metre tape)

(v) 309 cm is equal to …………… cm (3 m 9 cm / 30 m 9 cm)

**3.** (i) Convert 18 m into centimeters.

(ii) Change 32 m 47 cm into centimeters.

(iii) Convert 7 km into meters.

(iv) Convert the following:

(a) 372 cm into meters and centimeters

(b) 2832 cm into meters and centimeters

(v) Convert the following as desired:

(a) 3275 m into kilometers and meters

(b) 5217 m into kilometers and meters

(c) 57 dm into m and cm

**4. Put appropriate sign >, < or = in the boxes.**

(i) 32 m 76 cm…………… 48 m 90 cm

(ii) 12 m + 22 m …………… 28 m

(iii) 1 m …………… 100 cm

(iv) 78 m 30 cm – 23 m 20 cm …………… 84 m 10 cm – 56 m 10 cm

**5. Add
the following:**

(i) 72 m 50 cm + 15 m 75 cm

(ii) 102 m 25 cm + 375 m 85 cm

(iii) 8 dm 9 cm + 9 dm 8 cm

(iv) 75 km 312 m + 34 km 215 m

(v) 212 km 132 m + 18 km 230 m

(vi) 81 km 570 m + 17 km 915 m

**6. Fill in the blanks:**

(i) To convert metres into centimetres, we multiply the number of metres by ……………

(ii) 5000 cm = …………… m

(iii) 427 cm = …………… m …………… cm

**7. Subtract
the following:**

(i) 128 km 525 m - 20 km 278 m

(ii) 25 m 38 cm - 18 m 78 cm

(iii) 9 dm 3 cm - 2 dm 9 cm

(iv) 73 km 975 m 87 cm - 23 km 375 m 27 cm

(v) 250 km 378 m 75 cm - 150 km 287 m 50 cm

**8.** Convert 34 m 28 cm into centimetres.

**9.** Convert 704 cm to metres.

**10.** Convert 7654 cm into metres.

**11****. Add the following:**

(i) 132 m 65 cm, 234 m 50 cm and 37 m

(ii) 34 m 69 cm and 28 m 12 cm

**12. Subtract the following:**

(i) 148 m 79 cm from 938 m 33 cm

(ii) 30 m 58 cm from 152 m 55 cm

**13.** A tailor has 345 m 25 cm of cloth. He used 29 m 23 cm for
stitching. How much cloth is left with him?

**14.** A shopkeeper had a 289 m 96 cm long roll of electric wire. He
sold 32 m 95 cm to one customer, 24 m 65 cm to another customer. How much wire
did he sell in all? How much wire is left in the roll?

Answers for the worksheet on third grade measurement of length are given below to check the exact answers of the above questions on standard units of length.

**Answers:**

**1.** (i) 1000 m

(ii) 100 cm

(iii) 10 cm

(iv) 10 dm

(v) 100000 cm

**2. **(i) cm

(ii) km

(iii) 500

(iv) metre tape

(v) 3 m 9 cm

**3.** (i) 1800 centimeters

(ii) 3247 centimeters

(iii) 7000 meters

(iv) (a) 3 m 72 cm

(b) 28 m 32 cm

(v) (a) 3 km 275 m

(b) 5 km 217 m

(c) 5 m 70 cm

**4. **(i) <

(ii) >

(iii) =

(iv) >

**5. **(i) 88 m 25 cm

(ii) 478 m 10 cm

(iii) 18 dm 7 cm

(iv) 109 km 527 m

(v) 230 km 362 m

(vi) 99 km 485 m

**6. **(i) 100

(ii) 50

(iii) 4, 27

**7. **(i) 108 km 247 m

(ii) 6 m 60 cm

(iii) 6 dm 4 cm

(iv) 50 km 600 m 60 cm

(v) 100 km 91 m 25 cm

**8.** 3428 cm

**9.** 7 m 4 cm

**10.** 76 m 54 cm

**11****. **(i) 404 m 15 cm

(ii) 62 m 81 cm

**12. **(i) 789 m 54 cm

(ii) 121 m 97 cm

**13.** 316 m 2 cm

**14.** 232 m 36 cm

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