Question

2.Solve (2 points each) 85.212-3.410 6.17x3.9 17.5+5 )​

Answer 1

Answer:

(92-927-027)++9262+)$($+2(2))$)$)$?

Answer 2

Correct Question:

i) 85.212 - 3.410

ii) 6.17 x 3.9

iii) 17.5+5

Answer:

$85.212 - 3.410 = 81.802$

$6.17\times3.9=24.063$

$17.5+5=22.5$

Step-by-step explanation:

From the given question, we should solve three questions.

• We should do the Subtraction for first question
• We should do the Multiplication for second question
• We should do the Addition for third question  

Solution:

$i) 85.212-3.410$

• This is the concept of decimal subtraction.
• Decimal Subtraction:" Write down the given numbers, one under the other, with the decimal points.
• Then subtract normally, and put the decimal point in the answer.

                    $85.212$

              (-)     $3.410$

                 _______

                    $81.802$

                 _______

• Subtraction should do from right to left.Which means that we should start from last digit.
• Subtract $2$ (in 85.212) and $0$ (in 3.410). Then we will get the answer of last digit is 2 ⇒ ($2-0=2$).
• Then subtract 1 (in 85.212) and 1 in (in 3.410). Then we get the value 0  ⇒ ($1-1=0$).
• Now subtract $2$ (in 85.212) and 4 in (in 3.410). Here we can't subtract 4 from 2. So we should use borrow concept

Borrow: "Borrow means to take the value from one number and assign them to the next number".

• So that, for $2$ borrow one value from 5 in 85.212.Now $2$ will be consider as $12$. Now subtract $4$ from $12$. Then we get the value 8 ⇒ ($12-4=8$)

• After the borrow value of  5 in 85.212 change into 4. Now subtract $4$ and $3$ (in 3.410) then we will get the value 1 ⇒ ($4-3=1$).
• Finally we drop down directly the value $8$ (in 85.212)
• Answer: $85.212 - 3.410 = 81.802$

$ii)6.17\times 3.9$

• The given above question is decimal multiplicaton.
• Decimal multiplicaton: "Decimal numbers are multiplied first by without decimal point as normal multiplication.
• And finally we should placed decimal point in the answer by adding the number of digits present after the decimal points in the question"

Step 1:

• Now multiply $6.17$ and $3.9$ without decimal point.That is,

                $617*39=24063.$

Step 2:

• Now the decimal point is place before 3 digits from the left.
• Because 6.17 having 2 digits after the decimal point and 3.9 having 1 digit after the decimal point.
• So the product should be written as 24.063
• Answer: $6.17\times3.9=24.063$

$iii)17.5+5$

• This is the concept of decimal addition
• Decimal Addition:" Write down the given numbers, one under the other, with the decimal points.
• Then add normally, and put the decimal point in the answer.

             $\hspace{2mm}17.5\\+5.0$

              ____

               $22.5$

              ____

• Addition done from after the decimal point. After adding a last digit we get the value $5$.
• Now we add before decimal point.That is add 7 in 17.5 and 5.The addition value is 12.
• So drop down 2 in the answer we should carry 1

Carry: "In addition, if larger numbers are added we can get a carry  and this carry is shifting of leading digits into the left value"

• So we should add carry 1 to 1 in 17.5.So we get the value 2.
• Answer: $17.5+5=22.5$