Adding and Subtracting Decimals Review

True/False

100

When adding and subtracting decimals, you always include the decimals.

True

200

When adding and subtracting decimals, you always put the longer number on top.

False

300

When adding and subtracting decimals, you ignore the decimal points.

False

400

When adding and subtracting decimals you put the bigger number on top.

True

500

When adding and subtracting decimals, you count how many numbers are behind the decimals in the problem and put that in your answer.

False! 

Adding Decimals

100

3.14 + 5.12 = 

What is 8.26?

200

14.73+15.1=

What is 29.83?

300

3 + 4.55=

What is 7.55?

400

17.82 + 3.66=

What is 21.48?

500

11.7 + 2.81=

What is 14.51?

Subtracting Decimals

100

20.8 - 7.34=

What is 13.46?

200

34.63 - 27.9=

What is 6.73?

300

150- 0.48=

What is 149.52?

400

6 - 2.33=

What is 3.67?

500

1124.09 - 567.87=

What is 556.22?

Adding and Subtracting Decimals

100

12.46 + 3.8=

16.26

200

4.5 - 3.79=

What is 0.71?

300

79.38 - 9.19=

What is 70.19?

400

12.13 + .9=

What is 13.03?

500

10.21 - 5.6=

What is 4.61?

Math Riddles

100

I have a pound of feathers and a pound of iron? Can you please tell me which one weighs more?

Both of them would be of the same weight. A pound remains a pound despite the type of object.

200

There is an empty basket that is one foot in diameter. Can you tell me the total number of eggs that you can put in this empty basket?

Only One Egg! Once you put an egg into the basket, it doesn’t remain empty anymore.

300

 1+9+8=1, then what can be 2+8+9?

10! (Consider the first letter of the spelling of each digit, One+Nine+Eight= ONE, similarly Two+Eight+Nine= TEN)

400

Ram has 5 sons. Each of his sons has a sister. If so, how many children does Mr. Ram have?

Six. All of the sons have the same sister.

500

Help me to find my friend. He is an odd number, but if you take away an alphabet from him, he becomes Even. Who is he?

Seven