Question

Add the following by using place value grid. 

(i) 25.8 + 18.53

(ii) 17.4 + 23.435

Answer 1

(i) 25.8 + 18.53. 

Using place value grid.

Decimal No	Tens	Ones	Tenths	Hundredths
25.8	2	5	8	0
18.53	1	8	5	3
44.33	4	4	3	3

Therefore 25.8 + 18.53 = 44.33

(ii) 17.4 + 23.435 

Lets use the place value grid.

Decimal No	Tens	Ones	Tenths	Hundredths	Thousandths
17.4	1	7	4	0	0
18.53	1	8	5	3	5
44.33	4	4	3	3	5

Therefore 17.4 + 23.435 = 40.835