Examples with solutions for Special Cases (0 and 1, Inverse, Fraction Line): Decimal numbers

Exercise #1

0+0.2+0.6= 0+0.2+0.6= ?

Video Solution

Step-by-Step Solution

According to the order of operations, the exercise is solved from left to right as it contains only an addition operation:

0+0.2=0.2 0+0.2=0.2

0.2+0.6=0.8 0.2+0.6=0.8

Answer

0.8

Exercise #2

Solve the following exercise:

90+0.5= 9-0+0.5=

Video Solution

Step-by-Step Solution

According to the order of operations rules, since the exercise only involves addition and subtraction, we will solve the problem from left to right:

90=9 9-0=9

9+0.5=9.5 9+0.5=9.5

Answer

9.5

Exercise #3

0.18+(11)= 0.18+(1-1)=

Video Solution

Step-by-Step Solution

According to the order of operations rules, we first solve the expression in parentheses:

11=0 1-1=0

And we get the expression:

0.18+0=0.18 0.18+0=0.18

Answer

0.18

Exercise #4

12+0.50= \frac{1}{2}+0.5-0=

Video Solution

Step-by-Step Solution

According to the order of operations, we will solve the exercise from left to right.

12=0.5 \frac{1}{2}=0.5

0.5+0.5=1 0.5+0.5=1

10=1 1-0=1

Answer

1

Exercise #5

181×0.1= 18-1\times0.1=

Video Solution

Step-by-Step Solution

According to the rules of the order of operations we should begin by placing the multiplication exercise within parentheses:

18(1×0.1)= 18-(1\times0.1)=

We then proceed solve the multiplication exercise:

1×0.1=0.1 1\times0.1=0.1

And we should obtain the following exercise:

180.1=17.9 18-0.1=17.9

Answer

17.9

Exercise #6

6+8.4×1= 6+\text{8}.4\times1=

Video Solution

Step-by-Step Solution

According to rules of the order of operations , we must first place the multiplication exercise inside of parentheses:

6+(8.4×1)= 6+(8.4\times1)=

Let's now proceed to solve the said expression:

8.4×1=8.4 8.4\times1=8.4

We should obtain the following exercise:

6+8.4=14.4 6+8.4=14.4

Answer

14.4

Exercise #7

8.5×102=? \frac{8.5\times10}{2}=\text{?}

Video Solution

Step-by-Step Solution

First we'll solve the multiplication exercise in the numerator:

8.5×10=85 8.5\times10=85

and we'll get:

852=42.5 \frac{85}{2}=42.5

Answer

42.5 42.5

Exercise #8

0.18+0.3789+1321= \frac{0.18+0.37}{89+13-\frac{2}{1}}=

Video Solution

Step-by-Step Solution

To solve the expression 0.18+0.3789+1321= \frac{0.18+0.37}{89+13-\frac{2}{1}}= , we need to follow the order of operations carefully.


  • Step 1: Simplify the expression in the numerator: 0.18+0.37 0.18 + 0.37 .


0.18+0.37=0.55 0.18 + 0.37 = 0.55

  • Step 2: Simplify the expression in the denominator. Start by simplifying 21 \frac{2}{1} which is simply 2 2 .

  • Step 3: Continue with the expression: 89+132 89 + 13 - 2 .


89+13=102 89 + 13 = 102
1022=100 102 - 2 = 100

  • Step 4: Substitute the simplified expressions back into the main fraction: 0.55100 \frac{0.55}{100} .


0.55100=0.0055 \frac{0.55}{100} = 0.0055

Thus, the solution to the expression is 0.0055 0.0055 .

Answer

0.0055