Positive & Negative Numbers 1ESO

Decimals

100

2.57 × 4.66 =?

Round to the nearest 100th.

11.98

200

9.49 ÷ (-0.65) =  

-14.6

300

Order the decimals from least to greatest: 

.8776

.009

1.7786

.8767

.009

.8767

.8776

1.7786

400

Convert these numbers to decimals:

3/5

7/2

10/100

0.6

3.5

0.1

500

9.4 + 6.2 × (-3.926)

-14.9412

Addition and Subtraction

100

(-4,5) - (-4,5) =

0

200

(-256,56) + (-54,35) =

-310,91

300

(-5,0) + (-7,5) =

-12,5

400

(-10/25) + (+25/10) =

 15/10

500

(-5/2) + (+4/3)

 -7/6

Fractions

100

2/3 +5/6 - 6/12 

 1 

200

5/15 of 195

65

300

Simplify:

400/1000

14/56

3/21

5/9

4/10 or 2/5

1/4

1/7

5/9

400

Convert these decimals to fractions and simplify:

,333

,88

,25

333/1000

88/100 or 22/25

25/100 or 1/4

500

Order the fractions from least to greatest: 

2/5

11/20

7/12

,4= 2/5

,55= 11/20

,5833= 7/12

Multiplication

100

-10 times -90

+900

200

(-125) x (+5) =

- 625

300

(-10) x (-25674) =

+256.740

400

-12 times 45/9

60

500

25/234 times 5/15.

Simplify.

125/3510= 25/702

Division

100

(-21) / (-7) =

3

200

(-144) / (-12) =

12

300

-1806/602

-3

400

2/14 divided by 3/18

Simplify.

36/42= 6/7

500

(14/21) divided by (12/15). 

Simplify.

210/252 = 5/6