math questions how to solve equations with addition

PART 1

 

1) t + (-1.4) = 0
a. t = -1.4
b. t = 1.4
 
c. t = 2.8
d. t = -2.8
 
e. t = 0
 
f. t = -1
2) m + (-0.5) = -4.1
a. m = -4.6
b. m = 4.6
c. m = 8.2
 
d. m = -8.2
 
e. m = -3.6
f. m = 3.6
3) -14 – a = -21
a. a = -35
b. a = 35
c. a = 3/2
d. a = -3/2
e. a = -7
 
f. a = 7
4) -19 + n = -23
a. n = 42
b. n = -42
c. n = 4
d. n = -4
 
e. n = 23/19
f. n = -23/19
5) r – 6.5 = -9.3
a. r = -2.8
 
b. r = 2.8
 
c. r = 15.8
d. r = -15.8
e. r = 0.6
 
f. r = 1.8

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PART 2

 

 

13) r + (-11) = -21
a. r = 32
b. r = -32
 
c. r = 10
d. r = -10
 
e. r = 21/11
f. r = -11/21
14) -6 – p = -27
a. p = 21
 
b. p = -21
c. p = 33
 
d. p = -33
 
e. p = 27/6
 
f. p = -27/6
15) x + 4.2 = 1.5
a. x = 2.7
 
b. x = -2.7
 
c. x = 5.7
 
d. x = -5.7
e. x = 4.7
 
f. x = 3.7
16) k + 11 = -21
a. k = -32
 
b. k = -10
c. k = -20
d. k = 10
e. k = 32
 
17) a + 8 = -11
a. a = -3
 
b. a = 3
c. a = -88
d. a = 88
e. a = 19
f. a = -19
18) 14 + c = -5
a. c = -19
b. c = 19
c. c = -9
d. c = 9
e. c = -70
f. c = 70
19) k + (-5) = -11
a. k = 55
b. k = -55
c. k = 6
d. k = -6
 
e. k = 16
f. k = -16
20) -16 – k = -7
a. k = -23
b. k = 23
 
c. k = 7/16
d. k = -7/16
e. k = -9
 
f. k = 9

 

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