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Addition
Subtraction
Multiplication
Questions
Questions
100

2.6 + 4.9

7.5

100

3.8 - 2.5

1.3

100

2.7 x 2.4

6.48

100

Are decimals whole numbers?

Decimals are not included in the set of whole numbers.

100

What is the most important part of a decimal?

The decimal point.

200

13.3 + 14.2

27.5

200

12.3 - 10.2

2.1

200

3.31 x 2.3

7.613

200

What is the most important part to adding and subtracting decimal?

The most important thing is to keep your decimal points lined up.

200

Do decimals have to line up when multiplying? Why or Why Not?

No, you do not need to line up the decimal points, just the right-most digits.

300

4.32 + 3.26

7.58

300

5.36 - 4.28

1.08

300

2.47 x 1.21

2.9887

300

What is the most important thing when multiplying decimals?

The decimal point should be placed in the product in such a way that, the product has a number of decimal places equal to the sum of decimal places of all the multiplicands and the multipliers.
300

Why do we need to learn addition and subtraction of decimals?

We need to find the sum or total or find the differences in values.

400

13.3 + 14.2

49.56

400

28.39 - 26.28

2.11

400

1.28 x 1.5

1.92

400

What is the purpose of using decimals?

Checking rational numbers or irrational numbers.
400

What happens when you multiply a decimal by a whole number?

You put the same number of digits after the decimal as there were in the original decimal number.

500

29.16 + 4.22

33.38

500

46.27 - 43.28

2.99

500

1.32 x 2.21

2.9172

500

What operation is used in adding decimal number?

Line up the decimal points and then add or subtract.

500

Why is it necessary to deal with operations of decimal how is it important in our daily life?

Decimal numbers are used in situations where more precision is required than the whole numbers can provide.