Lesson 8.18.1 Small Group · Group 1
Group 1 · Set BSecond form · new problems, same idea
Learning target With my small group, I can write an equation for a real situation and check whether a given value is a solution by substituting it — one step at a time, with support.
Remember8.1 Small Group · Group 1
To check a value, replace the variable with it; if both sides of the equation are equal, the value is a solution. An equation says two amounts are equal. A solution is a value that makes the equation true.
Words: Equation (Ecuación)Variable (Variable)Equal sign (Signo igual)Expression (Expresión)Constant (Constante)
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1Complete each step, then write the final answer.
Which value is a solution of n + 7 = 13: 5, 6, or 7?
Show your workHint Replace n with each number. Which one makes the left side equal 13?
Final answer: -
2Complete each step, then write the final answer.
Which value is a solution of n + 6 = 21: 13, 15, or 27?
Show your workHint Replace n with each value. Which one makes both sides 21?
Final answer: -
3Complete each step, then write the final answer.
Each pack has 6 juice boxes. Maria buys p packs and gets 24 juice boxes. The equation is 6p = 24. Which value is a solution: 3, 4, or 18?
Show your workHint 6p means 6 times p. Multiply 6 by each value.
Final answer: -
4Complete each step, then write the final answer.
The letter can be on the right side too. Which value is a solution of 52 = n + 19: 33, 43, or 71?
Show your workHint Replace n with each value. The right side must be 52.
Final answer:
Explain your thinkingWhy do you replace the letter with the number to check a solution? Use Rosa's mistake to explain.
Sentence starter To check, I replace ___ with ___. · A value is a solution when ___.