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Grade 4 - Mathematics
9.4 Decimal Problems

Converting decimals to fractions
  1. Write the number without the decimal point.
  2. Divide the number with as many tens as the number of digits after the decimal point.
Example: Convert 0.75 to a fraction.
Numerator - 75
Denominator - 100 (since there are 2 numbers after the decimal point)
Answer: 75/100
Adding decimals
Add 0.35 and 0.42


  1. Take a square divide into hundred parts.
  2. Mark 0.35 by shading 3 tenths and colouring 5 hundreths.
  3. Similarly mark o.42 by shading 4 tenths and colouring 2 hundredths.
  4. Now count the total number of tenths and hundredths in the square.
Answer: 0.77
Subtracting decimals


  1. Write the decimals one below the other as shown.
  2. Subtract as shown.
Answer: 1.76

Directions: Answer the following questions. Also write at least 5 examples of your own for each of the following:
* converting fraction to decimal
* adding two decimals
* subtracting two decimals
Q 1: Which is the correct way to write five and eight hundredths?
8.05
5.8
5.08
580

 Q 2: Fill in the blank 400.99 - 399.09 =
1.9
399.08
1.8

Q 3: What decimal is between 9 and 10?
10.5
9.7
8.9
11

 Q 4: What decimal is between 54 and 55?
54.6
55.9
53.2
55.6

Q 5: What is the sum of 2.36 + 1.87?
3.23
4.23
4.27
4.13

 Q 6: What decimal is between 12.4 and 12.6?
12.5
12.3
12.1
12.7

Q 7: Add the decimals 6.30 + 6.03 =
12.34
12.33
12.39

 Q 8: What is the sum of 32.8 + 53.6?
86.4
85.5
86.2
85.4

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 Question 10: This question is available to subscribers only!


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