We will learn Addition and Subtraction of Units of Measurement.

We can add the units of measurement like decimal numbers.

Addition of Units of Measurement:

**1.** Add 5 m 9 dm and 11 m and 5 dm

**Solution:**

5 m 9 dm = 5.9 m

11 m 5 dm = 11.5 m

Hence, 5 m 9 dm + 11 m 5 dm

= 17 m 4 dm or 17.4 m

**2.** Add 15 cm 5 mm and 21 cm 9 mm

**Solution:**

15 cm 5 mm = 15.5 cm

21 cm 9 mm = 21.9 cm

Hence, 15 cm 5 mm + 21 cm 9 mm

= 37 cm 4 mm or 37.4 cm

**3.** Add 67 km 250 m and 84 km 720 m

**Solution:**

67 km 250 m = 67.250 km

84 km 720 m = 84.720 km

Hence, 67 km 250 m + 84 km 720 m

= 151 km 970 m or 151.97 km

We can add lengths like ordinary numbers.

**3.** Add 24 km 250 m and 140 km 18 m

**Solution:**

24 km 250 m = 24.250 km

140 km 18 m = 140.018 km

Hence, 24 km 250 m + 140 km 18 m

= 164 km 268 m or 164.268 km

More problems on Addition of Units of Length

**4.** Add 65 km 146 m and 29 km 950 m.

**Solution:**

Write in column form and add

Add the meters 146 + 950 = 1096 m 1096 m = 1 km + 96 m Write 96 under the meter column and carry over 1 km to km column. Add kilometres 65 + 29 + 1 (carry over) = 95 km |

Hence, 65 km 146 m + 29 km 950 m = 95 km 96 m

Subtraction of Units of measurement:

We can subtract the units of measurement like decimal numbers.

**1.** Subtract 28 dg 7 mg from 90 dg

**Solution:**

28 dg 7 mg = 28.07 dg

90 dg = 90.00 dg

Hence, 90.00 dg - 28.07 dg

= 61 dg 93 mg or 61.93 dg

**2.** Subtract 185 l 560 ml and 200 l 120 ml

**Solution:**

185 l 560 ml = 185.560 l

200 l 120 ml = 200.120 l

Hence, 200 l 120 ml - 185 l 560 ml

= 14 l 660 ml or 14.660 l

**3.** Subtract 25 km 340 m from 61 km 180 m

**Solution:**

Write in column form and subtract.

As we cannot subtract 340 m from 180 m, we borrow 1 km from 61 km. So 61 km becomes 60 km and 180 m becomes 1 km = 1000 m + 180 m = 1180 m. Now, subtract 340 km from 1180 m. 1180 – 340 = 840 |

Subtract km 60 – 25 = 35

**4.** The height of building X is 6314 cm and that of building Y is 229 cm less. What is the height of building Y?

**Solution:**

The height of building X = 6314 cm = 63.14 m

The height of building Y is 229 cm less than building X.

Therefore, the height of building Y = 63.14 m - 2.29 m

Hence, the height of building Y = 60.85 m

Questions and Answers on Addition of Units of Length:

**1. Add the given measurements:**

(i) 46 m 23 cm + 8 m 95 cm

(ii) 13 km 547 m + 16 km 485 m

(iii) 24 dm 03 cm + 15 dm 01 cm

(iv) 6 km 920 m + 34 km 285 m

(v) 13 km 765 m + 24 km 880 m

(vi) 56 m 09 cm + 16 m 25 cm

(vii) 43 m 04 cm + 27 m 03 cm

(viii) 23 cm 02 mm + 16 cm 03 mm

(ix) 36 cm 00 mm + 8 cm 09 mm

**Answers:**

(i) 55 m 18 cm

(ii) 30 km 32 m

(iii) 39 dm 04 cm

(iv) 41 km 205 m

(v) 38 km 645 m

(vi) 72 m 34 cm

(vii) 70 m 07 cm

(viii) 39 cm 05 mm

(ix) 44 cm 09 mm

Questions and Answers on Subtraction of Units of Length:

**2. Subtract the given measurements:**

(i) 34 m 15 cm – 12 m 10 cm

(ii) 26 km 803 m – 19 km 450 m

(iii) 57 dm 08 cm – 15 dm 09 cm

(iv) 61 km 250 m - 45 km 300 m

(v) 9 m 46 cm – 7 m 96 cm

(vi) 8560 m 00 cm – 7789 m 00 cm

(vii) 63 cm 03 mm – 12 cm 02 mm

(viii) 72 m 06 cm – 35 m 21 cm

(ix) 50 km 000 m – 44 km 390 m

**Answers:**

(i) 22 m 05 cm

(ii) 7 km 353 m

(iii) 41 dm 99 cm

(iv) 15 km 950 m

(v) 1 m 50 cm

(vi) 771 m 00 cm

(vii) 51 cm 01 mm

(viii) 36 m 85 cm

(ix) 5 km 610 m

**5th Grade Numbers****5th Grade Math Problems****From Addition and Subtraction of Units of Measurement to HOME PAGE**

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