6th Grade Math Textbook, Fundamentals

Lesson 4-12 for exercise sets. &KDSWHU 

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Solve and check.

1.x11.7 28.9 2. 54 b(14.2) 3.7.04 x10.33

4.88.3 n(6.8) 5.w+ 49.8 13.3 59.6 6.0.513 x0.049 17.6

7.Discuss and Write List the steps you would use to solve each equation:

n0.6 2,(0.6) n2, and n 2 0.6. Explain how the steps are

the same and how they are different.

Check:m(9.06) 8.47

0.59(9.06) 8.47 Substitute 0.59 for m.

(0.59) (9.06) 8.47

8.47 8.47 Tr u e

To solve a subtraction equation, you can write and

solve a related sentence.

Solve:5.2 k6.6

6.6 k5.2 Write a related sentence.

6.6 6.6k5.2 6.6 Subtract 6.6 from both sides to isolatek.

k1. 4

Check:5.2 k6.6

5.2 (1.4 ) 6.6 Substitute 1.4 for k.

5.2 1.4 6.6

6.6 6.6 Tr u e

You can combine numerical terms before solving an addition and

subtraction equation.

Solve:2.5 y(1.8) 0.50.8

2.5 y (1.8) (0.5) 0.8 Use the additive inverse to rewrite as addition.

y2.5[1.8 (0.5)]0.8

y2.5 [1.8 (0.5)]0.8 Add the numbers with like signs.

y2.5 (2.3)0.8 Add the numbers with unlike signs.

y0.2 0.8

y0.2 0.20.8 0.2 Subtract 0.2 from both sides to isolate y.

y0.6

Check: 2.5 y(1.8) 0.5 0.8

2.5 0.6(1.8) 0.5 0.8 Substitute 0.6 for y.

2.5 0.6 (1.8) (0.5) 0.8 Rewrite subtraction as addition. Add numbers with like signs.

3.1  (2.3) 0.8 Add the numbers with unlike signs.

0.8 0.8 Tr u e

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Use the Commutative and Associative Properties to

group numbers and like signs.

Think

0.59 9.06 9.06 0.59

Related Sentences

a b c

so a c b

andc b a