Question

B. Write in column form and solve. (2pts each)
11-12) 45.05 + 16.319 =
13-14) 25.927 + 22.698 =
15-16) 15.279 + 9.082 + 16.18 =
17-18) 84.72 - 38.289 =
19-20) 55.03 - 15.751 =​

Answer 1

Answer:

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Adding Numbers in Expanded Form

Learn to arrange for adding numbers in expanded form (in short form and in long form). The numbers are written in column form; the digits are arranged in expanded form and then finally find the sum of the given numbers.

Solved examples on adding numbers in expanded form:

1. Add 32 and 25

Solution:

Numbers are written in column form T O

3 2

+ 2 5

5 7

Adding ones: 2 ones + 5ones = 7 ones

This 7 is written in one’s column.

Adding tens: 3 tens + 2 tens = 5 tens

This 5 is written in tens column.

Thus, answer is 57

2. In other way, add the expanded form of the numbers 32 + 25

Solution:

32 = 30 + 2 Expanded form of the numbers

+ 25 = 20 + 5

= 50 + 7

= 57

The numbers are written in expanded form as 32 = 30 + 2 and 25 = 20 + 5.

Now digits of one’s place are added, i.e., 2 + 5 = 7.

Again numbers of ten’s place are added, i.e., 30 + 20 = 50

Therefore, total sum = 50 + 7 = 57

3. Add 63 and 35 in long form.

Solution:

Numbers are placed in column

63 Sum of digit of one’s place = 3 ones + 5 ones = 8 ones

+ 35 Sum of digit of ten’s place = 6 ten’s + 3 ten’s = 9 ten’s

Therefore, sum = 98 = 9 ten’s + 8 ones

4. Add 38 and 61 in short form.

Solution:

38 Sum of digit of one’s place = 8 + 1 = 9

+ 61 Sum of digit of ten’s place = 30 + 60 = 90

Therefore, sum = 99 = 90 + 9

5. Add 23, 31 and 44

Solution:

23 Sum of digit of one’s place = 3 +1 + 4 = 8

+ 31 Sum of digit of ten’s place =2 + 3 + 4= 9

+ 44

Therefore, sum = 98

Step-by-step explanation:

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