Decimals Operations

Decimal Addition

100

45.4+7.6

What is 53

200

35.7+52.4

What is 88.1

300

14.68+70.05

What is 84.73

400

140.7+256.8

What is 397.5

500

893.57+613.88

What is 1507.45

Decimal Subtraction

100

6.3-2.7

What is 3.6

200

7.75-3.60

What is 4.15

300

68.99-62.56

What is 6.43

400

4-3.4

What is 0.6

500

80-0.088

What is 79.912

Challenge

100

76+5.89

What is 81.89

200

132.06+37.491

What is 169.551

300

5.888+197.3

What is 203.188

400

6.26 x 2.5 =

What is 15.6500 or 15.65

500

6.6 - 1.991

What is 4.609

Identify the Error

100

The value of the 8 in 54.821 is tenths

What is 0.8

200

The decimal expanded form (notation) of 632.509 is 

600 + 30 + 2 + 0.5 + 0.09

That is regular expanded form showing the value

300

The fraction expanded form (notation) of 45.603 is

45 + (6 x 1/10) + (3 x 1/100)

(4 x 10) + (5 x 1) + (6 x 1/10) + (3 x 1/1000)

400

Jed said that the following statement is correct why is this incorrect

34.967 > 34.97

He did not compare the digit in the hundredths place 6 is less than 7

500

Sally said that 18.99 rounded to the nearest tenth is 18.9 why is this incorrect?

The 9 in the hundredth place caused the 9 in the tenths place to round up to a 10.  Then you have to ad 1 to the 8 making the new number 19.0

Vocabulary Review

100

What is the best and most fun subject

Math, math, math math!!!!

200

The answer to a multiplication problem is

What is product

300

What is the 9 in this problem called 235 divided by 9

What is the divisor

400

Is the following prime or composite AND why

1, 3, 5, 7

What is prime because it only has factors of 1 and itself.

500

What is the answer to a division problem

What is quotient