Lesson 8.38.3 Small Group · Group 1
Group 1 · Set BSecond form · new problems, same idea
Learning target With my small group, I can solve one-step multiplication and division equations using inverse operations — one step at a time, with support.
Remember8.3 Small Group · Group 1
To get the variable alone, divide both sides to undo multiplying, or multiply both sides to undo dividing. Division undoes multiplication, and multiplication undoes division. Do the same thing to both sides.
Words: Inverse operation (Operación inversa)Multiply (Multiplicar)Divide (Dividir)Isolate (Despejar)Coefficient (Coeficiente)
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1Complete each step, then write the final answer.
Solve 5x = 40.
Show your workHint 5x means 5 times x. Divide both sides by 5.
Final answer: -
2Complete each step, then write the final answer.
Solve 7x = 56.
Show your workHint 7x means 7 times x. Divide both sides by 7.
Final answer: -
3Complete each step, then write the final answer.
One box holds 20 bags of crackers. The student council needs 140 bags. Write and solve an equation for the number of boxes b.
Show your workHint b boxes with 20 bags each make 140 bags. Write 20b = 140.
Final answer: -
4Complete each step, then write the final answer.
Solve x ÷ 6 = 2.5.
Show your workHint x is divided by 6. Multiply both sides by 6. Think: 6 groups of 2.5.
Final answer:
Explain your thinkingLia multiplied when she should have divided. How do you decide whether to multiply or divide both sides?
Sentence starter x is ___ by the number, so I ___ both sides. · I know my answer is right because ___.