Kr 12 coefficient similar terms with the solution.

CHECK WORK No. 12
Option 1
A1. Open the brackets and find the value of the expression: 3.7 – (1.4 – 2.8)
a) – 20 aub) 5.8 mc) –x
A4. Simplify the expressions:
a) 1.2 5xb)
c) – 12(- x) y d) 25 ah (-4)

a) - (3a – 5c) + 3ab) 3(2x+8) - (5x+2)
A6. Solve the equation: 12 x – 7x = 30

a) 5a + x – 5a + xb) 6a – a – 9m +6m – 3
23,6 + (14,5 – 30,1) – (6,8 + 1,9)
AT 2. Simplify the expression and find its value at m = 1.6.

a) 1.513 + 1.57b)

C1. For what values ​​of a is it true – a > a?
C2. Solve the equation: 0.6 (x + 7) – 0.5 (x – 3) = 6.8

CHECK WORK No. 12
Coefficient. Expanding parentheses. Similar terms
Option 2
A1.Open the brackets and find the value of the expression: 3.2 – (1.1 – 2.3)
A2. Write down the expressions and underline the coefficient:
a) 15mxb) – 2.9mc) –a
A3.Find the product coefficient:
A4. Simplify the expressions:
a) 0.5 2ab)
c) – 80.3(- x) d) 15 (-3mn)
A5. Open the brackets (if possible, give similar terms):
a) 7a+(-4c+c)b) -2(a-8)+5.3a-2.7
A6. Solve the equation: 9x – 5x = 28
A7. Give similar terms:
a) -8 x + 3y + y + 8xb) 5x + 2x – 10a + 8a -2
IN 1. Open the brackets and find the meaning of the expression:
17,8 – (11,7 + 14,8) – (3,5 – 12,6)
AT 2. Simplify the expression and find its value at a = 2.1.
AT 3. Find the meanings of the expressions:
a) 3.5 2.4 – 3.5 1.4b)
In the tasks of part C you need to write down a detailed solution
C1. At what values ​​of t is t true?< – m?
C2. Solve the equation: 0.3(x – 2) – 0.2 (x+4) = 0.6

CHECK WORK No. 12
Coefficient. Expanding parentheses. Similar terms
Option 3
A1. Open the brackets and find the value of the expression: 2.4 – (6.2 – 3.7)
A2. Write down the expressions and underline the coefficient:
a) – 1.6ub) ayв) –mn
A3.Find the product coefficient:
A4. Simplify the expressions:
a) –0.9 4ab)
c) -1.4x∙(-5) d) 17 (-6kn)
A5. Open the brackets (if possible, give similar terms):
a) -6-(8a-1)b) 2(5-2x)+12x-7
A6. Solve the equation: 7 a – 2a = 30
A7. Give similar terms:
a) 3akh + 4akh – 5 – 9akhb) – 2у – 20 + 8у + y
IN 1. Open the brackets and find the meaning of the expression:
23,8 – (11,7 – 14,5) + (- 32, 5 – 19,7)
AT 2. Simplify the expression and find its value at.
AT 3. Find the meanings of the expressions:
a) 4.75 3.2 + 3.2 3.25 b)
In the tasks of part C you need to write down a detailed solution
C1. For what values ​​of c is true – c< c?
C2. Solve the equation: 0.5 (4+x) – 0.4 (x – 3) = 2.5

CHECK WORK No. 12
Coefficient. Expanding parentheses. Similar terms
Option 4
A1. Open the brackets and find the value of the expression: 3.5 – (2.7 – 4.2) A2. Write down the expressions and underline the coefficient:
a) – 2.01 aub) ahv) –xy
A3.Find the product coefficient:
A4. Simplify the expressions:
a) – 0.7 3ab)
c) –x ∙(-5) ∙0.45 g) 21 (-7ac)
A5. Open the brackets (if possible, give similar terms):
a) -5+(x-1)-7x b) -3(a-7)+5a-8
A6. Solve the equation: 2 x + 4x = 30
A7. Give similar terms:
a) 9xy + 3xy – 12 – xy b) 4a – 16 + 16 a – a
IN 1. Open the brackets and find the meaning of the expression:
8,7 + (13,7 – 15,2) – (24,6 – 20,1)
AT 2. Simplify the expression and find its value at k = 3.5.
AT 3. Find the meanings of the expressions:
a) 0.90.8 – 0.8 0.8b)
In the tasks of part C you need to write down a detailed solution
C1. For what values ​​of n is it true – n > n?
C2. Solve the equation: 0.4 (x – 9) – 0.3 (x+2) = 0.7

Attached files

"Mathematics" No. 2 7/2002, 22/2003

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OPTION 2

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OPTION 3

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OPTION 4

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