Question

1.Oblicz.

a.(-5)-(-1 3/4)

b.(-2,2)+(-10 1/5)

c.-(-1 1/3)+(-15)

d.-(-9)-(-4 1/4)

e.(-3 2/5)-4,8

f. 2 1/3+(-5 3/5)

2.

a.2,2+12/7+(-1,2)+(-1 5/7)

b.6 1/2+(-3,25)+(-1 3/4)+1

3.Do liczby -18 dodaj różnicę liczby -11 i lczby -9,5.

Answer 1

1
a)3 1/4
b)-12

c)-13 2/3

d)13 1/4

e)-8 2/5
f)-4 4/15

 

3. -18+1,5= 16,5

Answer 2

a.(-5)-(-1  3/4) =  -5 + 1 3/4 = - 4 3/4

b.(-2,2)+(-10 1/5) = - 2,2 - 10 1/5 = -2 1/5 - 10 1/5 =  - 12 2/5

c.-(-1 1/3)+(-15) = - 1 1/3 - 15 = - 1 1/3 - 14 3/3 = - 15 4/3

d.-(-9)-(-4 1/4) = 9 + 4 1/4 = 13 1/4

e.(-3 2/5)-4,8 = - 3 2/5 - 4 4/5 = - 7 6/5

f. 2 1/3+(-5 3/5) = 2 1/3 - 5 3/5 = 2 5/15 - 5 9/15 = - 3 4/15

 

a.2,2+12/7+(-1,2)+(-1 5/7) = 1 + 12/7 - 12/7 = 1

b.6 1/2+(-3,25)+(-1 3/4)+1 = 6 1/2 - 5 + 1 = 1 1/2+ 1 = 2 1/2

 

3.Do liczby -18 dodaj różnicę liczby -11 i lczby -9,5.

- 18+ [-11 - (- 9,5)] = - 18 + 1,5 = 16,5