Number System 1

Opposites

100

What is the opposite of -24?

24

200

What is the opposite of 2769?

-2769

300

What is the opposite of 5+3x11?

-38

400

What is the opposite of -3(2-1)?

3

500

What is the opposite of ∣5-7∣ +7? 

-9

Absolute Value

100

∣-76∣

76

200

∣-652∣

652

300

∣-4∣ 

4

400

Henry spent $12 on lunch, and $23 on dinner. What is the absolute value of what he spent for the day?

$35

500

Dillard spent $60 when he went shopping over the weekend. What is the absolute value of money spent?

$60

Adding and Subtracting Decimals

100

1.009-0.067=

0.942

200

5.21 + 9=

14.21

300

17.08 + 3.11 - 0.0365=

3.1465

400

2.6 + 1.1+(3.351+4.2)=

11.251

500

Semory spent $14.85 on Sunday and $6.99 on Monday. By Tuesday, his account was overdrawn by 4.68. How much will be in his account after a deposit of $11?

$6.32

Multiplying and Dividing Decimals

100

8.008 / 0.65=

12.32

200

1136 / 0.02=

56,800

300

52.10 / 2.5=

20.84

400

2.1 (10.84/0.26)=

87.5538462

500

An employee earns the minimum wage of $14.20 per hour working in New York City. If the employee works for 6.5 hours a day, how much will be earned for two days?

The employee would earn $184.60.

Riddles

100

What goes up but never comes down? 

Your age!

200

I am an odd number but once you take away a letter, I become even. What number am I?

Seven

300

There is a word that could be written forward, backward, or upsidedown and can still be read left to right. What is the word?

NOON

400

What is the next number in the series? 7,645 5,764 4,576

6,457

500

What is the maximum possible number of times you can subtract number 5 from number 25?

Once