8 chap. 1 & 2

+ rationals

100

-6 + (-4)

-10

200

-45 + 60.5

15.5

300

0.81 + (-3.19)

-2.38

400

-8/15 + 2/3

2/15

500

-3 3/4 + 2 2/5

-1 7/20

- rationals

100

28 - (-19)

47

200

9.3 - 19.5

-10.2

300

-22.7 - (-9.07)

-13.63

400

-1/6 - 7/9

-17/18

500

-3 3/4 - 2 2/5

-6 3/20

x rationals

100

1.5(-0.2)

-0.3

200

-50(-1.4)

70

300

-3.7(-0.14)

0.518

400

-7/8(-16/21)

2/3

500

-3 3/4(2 2/5)

-9

÷ rationals

100

-1.5 ÷ (-0.3)

5

200

0.54 ÷ (-0.6)

-0.9

300

8 ÷ 40

0.2

400

5/6 ÷ 1/2

1 2/3

500

5 1/4 ÷ (-1 1/2)

-3 1/2

square roots

100

-1²

1

200

(6/7)²

36/49

300

(-0.04)²

0.0016

400

what is the square root of 121?

11

500

what is the square root of 1/9?

1/3