# Relative numbers: answer key to 5th grade math exercises in PDF.

corrected by Report an error / Note? The answer key to the math exercises in 5th grade on relative numbers. Know how to compare two numbers and perform operations with addition, subtraction, multiplication and division. To place a point knowing its coordinates in an orthonormal plane.

Exercise 1:  Exercise 2:    Exercise 3:  Exercise 4:  Exercise 5: There are 103 years between these two deaths.

Exercise 6:    Exercise 7:

A = ( – 5 ) – ( + 7 ) – ( – 3 ) + ( + 11 ) B = ( – 2 ) + ( – 1 ) – ( + 4 ) + ( – 3 ) – ( – 8 )  C = ( – 28 ) – ( – 32 ) + ( -25 ) + ( + 28 ) + ( -32 ) D = ( – 25 ) – ( – 36 ) + ( + 12 ) – ( + 13 ) – ( – 10 )  E = 15 + 7 – 12 + 18

E=28

F = – 9 + 3 – 4 + 7

F=-3

G = 18 + 12 – 9 + 11 – 15 + 10

G = 27

Exercise 8:

Calculate the following numerical expression:  Exercise 9:

1. 2. Arrange the following relative numbers in descending order:  3. Give all negative integers greater than – 5.1
-5;-4;-3;-2;-1;0
4. Complete with a relative number: 0.005 <0.0054 < 0.01; – 6.1 < -6.05 < – 6.

5. Give all the relative integers that verify – 2.9 < a < 2.1 .

-2;-1;0;1;2

Exercise 10:
A =( 5-7 )+(-9)
A =( -2 )+(-9)
A = – 2 – 9
A = -11

B = [(-4) +( 5-3)] – (7+8)
B = [(-4) +(2)] – (15)
B = (-2) – (15)
B = – 2 – 15
B = – 17

C = [(8-9) -3] -( 8+4 )
C = [(-1) -3] -(12 )
C = (-4) -(12 )
C= – 4 – 12
C= – 16

D = [(1-3) +7) -2] + (7-8)
D = [((-2) +7) -2] + (-1)
D = [(+5) -2] + (-1)
D = (+3) + (-1)
D = 2

Exercise 11:

The abscissa of the first graduated line are :

A( + 2 ) B(-4) C(-2) D(0) E(+3) F(-3) G(+3,5) H(-3,5) .

The following numbers are arranged in ascending order:

-5.8<-5.35<-3.7<0<+6.28<+6.4 Exercise 12:

A = -27+12-( -4) + (-55) +5

A = -27+12+( +4) + (-55) +5

A = -27+12+4-55 + 5

A = -15+4-55 +5

A = -61

B =10,2+( -33) – (+4,7) +8,9+ (-7,8) – (-10,5)

B =10,2+( -33) + (-4,7) +8,9+ (-7,8) + (+10,5)

B =10,2 -33-4,7+8,9-7,8+10,5

B =10,2 -33 -4,7 +8,9 -7,8 +10,5

B = – 15,9

C = -101+23,7+ (-42,8) + (-32,9) +74,2

C = -101+23,7-42,8-32,9+74,2

C = -78,8

Exercise 13:

A=(-6)+(+7)+(+10)+(-11)

A=-6+7+10-11

A=1+10-11

A=0

B=(-2)+(-7)+(+9)

B=-2-7+9

B=-9+9

B=0

C=(-3)+(-7)+(+3,5)+(+8)+(-1)

C=-3-7+3,5+8-1

C=-10+3,5+8-1

C=-6,5+8-1

C=1,5-1

C=0,5

D=(-4)+(+9)-(-2)

D=-4+9+2

D=5+2

D=7

E=(+8)-(-5)-(+12)+(-2)

E=8+5-12-2

E=13-12-2

E=1-2

E=-1

Exercise 14:

The drawing represents a boat. Exercise 15:

A=(-8)+(+9)+(+4)+(-6)

A=-8+9+4-6

A=1+4-6

A=5-6

A=-1

B=(-25)+(-75)+(+37)+(+13)

B=-25-75+37+13

B=-100+37+13

B=-63+13

B=-50

C=(-6,4)+(+1,2)+(-12,3)+(-8)

C=-6,4+1,2-12,3-8

C=-5,2-12,3-8

C=-17,5-8

C=-25,5

Exercise 16:

 A= -2+(-5+3)+7 = 3 E=12–(7–9)–(-10+9)=15 F= -4-8+(3-11)+2 = – 18 G=7-(12-8-15)-(-7+4) = 21 I=5-(-7+2)-9 = 1 L=2-(-8+15)-(-2+11-4) = – 10 N= -9-(4-8+7)-4 = – 16 P= -9+(-4-7+6)+(-5+9-12)=- 22 R= -4+5-(2-8)-9 = – 2 S= -8-(-4+5-7)+(-2+9) = 5 T=3-(5-9)-(12-4+7) = – 8 U= -5-(-9+2)-(-4+6-11) = 11

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