Question

The sum of (5 tens and 20 hundredths)
and (40 tens and 9 tenths) is
(A) 328.9
(B) 250.1
(C) 429.5
(D) 451.1
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Answer 1

Answer:

option (D) is the correct.

Step-by-step explanation:

5 tens = 50

20 hundreths = 0.020 = 0.20

40 tens = 40×10 = 400

9 tenths = 9

50.20 + 400.90 = 451.10

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Answer 2

Given:

The sum of (5 tens and 20 hundredths)

and (40 tens and 9 tenths)

We have to write it as follows according to the questions:

• For 5 tens and 20 hundredths,

        5 tens = 5×10=50

        20 hundredths = 20/100 = 0.2

• For 40 tens and 9 tenths

       40 tens = 40 × 10 = 400

       9 tenths = 9/10 = 0.9

Now sum of both expression are:

 50.2

400.9  

 451.1

The correct option is "d"

Hence the answer is 451.1