Multiplication of Units of Mass

We can multiply the units of mass kg and g by a number like ordinary numbers.

1. Multiply 115 kg by 6.

Multiply Kg

Hence, 115 kg × 6 = 690 kg

2. Multiply 32 kg 126 g by 7.

Multiply Kg and g

Multiply the grams by 7.

126 × 7 = 882 g. Write 882 under g column.

Multiply the kilograms

32 × 7 = 224 kg

Write 224 under kg column.

Hence, 32 kg 126 g × 7 = 224 kg 882 g.

When measurements are given as combination of two units, we can also first convert the bigger units to lower units and then multiply.


Alternative method:

First convert 32 kg 162 g into gram and then multiply by 7.

Multiplication of Mass

32 kg 126 g = 32000 g + 126 g

                     = 32126 g

32126 × 7 = 224882 g

Convert 224882 g into kg

224882 g = 224000 + 882 g

                  = 224 kg + 882 g

                  = 224 kg 882 g

Hence 32 kg 126 g × 7 = 224 kg 882 g


3. Multiply 19 kg 763 g by 5.

Solution:

First convert 19 kg 763 g into gram and then multiply by 5.

Multiplication of Units of Mass

19 kg 763 g = 19000 g + 763 g

                      = 19763 g

19763 × 5 = 98815 g

Convert 98815 g into kg

98815 g = 98000 + 815 g

               = 98 kg + 815 g

               = 98 kg 815 g

Hence, 19 kg 763 g × 5 = 98 kg 815 g


Questions and Answers on Multiplication of Units of Mass:

1. The weight of one piece of each object is given. Find the weight of more.

Multiplication of Weight

(i) 5 bottles: __________

(ii) 20 pairs of shoes: __________

(iii) 10 books: __________

(iv) 45 bats: __________

(v) 17 chairs: __________

(vi) 16 pairs of skating boots: __________


Answers:

1. (i) 9 kg

(ii) 30 kg

(iii) 31 kg 500 g

(iv) 40 kg 500 g

(v) 72 kg 250 g

(vi) 42 kg 80 g


2. Multiply the given:

(i) 7 kg 34 g by 10

(ii) 42 g 30 mg by 5

(iii) 48 kg 16 g by 6

(iv) 80 kg 450 g by 3

(v) 33 g 72 mg by 11

(vi) 9 kg 355 g by 6


Answers:

2. (i) 70 kg 340 g

(ii) 210 g 150 mg

(iii) 288 kg 96 g

(iv) 241 kg 350 g

(v) 363 g 792 mg

(vi) 56 kg 130 g

You might like these




5th Grade Numbers

5th Grade Math Problems

From Multiplication of Units of Mass to HOME PAGE


New! Comments

Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.



Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.