Lesson 2.72.7 Small Group · Group 1
Group 1 · Set BSecond form · new problems, same idea
Learning target With my small group, I can divide with decimals by making the divisor a whole number first — one step at a time, with support.
Remember2.7 Small Group · Group 1
Move the decimal point the same number of places in both numbers, so the divisor is whole and the answer does not change. To divide by a decimal, move both decimal points until the divisor is a whole number. Then divide.
Words: Dividend (Dividendo)Divisor (Divisor)Quotient (Cociente)Decimal Division Algorithm (Algoritmo de división decimal)Equivalent division (División equivalente)
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1Complete each step, then write the final answer.
Find 9.6 ÷ 0.8.
Show your workHint Move both points 1 place right. Then divide the whole numbers.
Final answer: -
2Complete each step, then write the final answer.
Find 1.68 ÷ 0.4.
Show your workHint After you move both points, the dividend still has a decimal. Put the answer's point right over it.
Final answer:
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3Complete each step, then write the final answer.
A ribbon is 7.2 meters long. Each piece is 0.9 meter long. How many pieces can you cut?
Show your workHint Move both points 1 place right. Then find 72 ÷ 9.
Final answer: -
4Complete each step, then write the final answer.
A pitcher holds 2.7 liters of juice. Each glass holds 0.3 liter. How many glasses can you fill?
Show your workHint Divide the juice by the size of one glass. Make 0.3 a whole number first.
Final answer:
Explain your thinkingWhy must you move the point in both numbers, not only in the divisor? Use Leo's mistake to explain.
Sentence starter I move the point in both numbers because ___. · Leo got 0.8, but the answer is ___ because ___.