Ricardo C (Operations with rational numbers)

Addition

100

5.5 + 2.6 + 2.0

10.1

200

1/2 + 2/3 + 5.4

2.4

300

-9 + -3 

-12

400

79 + (-26)

53

500

-18 + (-26)

-85

Subtraction

100

2.6 - 1.4 =

-1.2

200

7.6 - 2.4

5.2

300

9 - 7.2

3.8

400

0.18 - 0.3

0.5

500

-2/3 - 2/3-2/9

-4

Multiplication

100

-3/4 by 9/-16

4/3

200

5 by -5/7

-7

300

0 by -7/5

0

400

-3/4 by -6

1/8

Division

100

81 divided by 0.9

90

200

-12/7 ÷ (-18)

2/21

300

-1/10) ÷ (-8/5)

1/16

Word Problems

100

is -32 + (-38) negative ?

Yes

200

a dragonfish is swimming at -900m relative to sea level. it rises 250m. what is the dragonfish's new depth relative to sea level

-650

300

From a rope 11 m long, two pieces of lengths 13/5 m and 33/10 m are cut off. What is the length of the remaining rope?

51/10 m 

400

A car is moving at an average speed of 202/5 km/hr. How much distance will it cover in 15/2 hours

303 km

500

An airplane covers 1020 km in an hour. How much distance will it cover in 25/6 hours?

4250 km