ALEX Classroom Resources

ALEX Classroom Resources  
   View Standards     Standard(s): [MA2019] (5) 4 :
4. Read, write, and compare decimals to thousandths.

a. Read and write decimals to thousandths using base-ten numerals, number names, and expanded form.

Example: 347.392 = 3 × 100 + 4 × 10 + 7 × 1 + 3 × (1/10) + 9 × (1/100) + 2 × (1/1000).

b. Compare two decimals to thousandths based on the meaning of the digits in each place, using >, =, and < to record the results of comparisons.
[MA2019] (5) 5 :
5. Use place value understanding to round decimals to thousandths.
Subject: Mathematics (5)
Title: Grade 5 Mathematics Module 1, Topic C: Place Value and Rounding Decimal Fractions
URL: https://www.engageny.org/resource/grade-5-mathematics-module-1-topic-c-overview
Description:

In Module 1, Topic C, students generalize their knowledge of rounding whole numbers to round decimal numbers to any place. In Grades 3 and 4, vertical number lines provided a platform for students to round whole numbers to any place. In Grade 5, vertical number lines again provide support for students to make use of patterns in the base ten system, allowing knowledge of whole-number rounding (4.NBT.3) to be easily applied to rounding decimal values (5.NBT.4). The vertical number line is used initially to find more than or less than halfway between multiples of decimal units. In these lessons, students are encouraged to reason more abstractly as they use place value understanding to approximate by using nearest multiples.

Naming those nearest multiples is an application of flexibly naming decimals using like place value units. To round 3.85 to the nearest tenth, students find the nearest multiples, 3.80 (38 tenths 0 hundredths) and 3.9 (39 tenths 0 hundredths), and then decide that 3.85 (38 tenths 5 hundredths) is exactly halfway between and, therefore, must be rounded up to 3.9.



   View Standards     Standard(s): [MA2019] (5) 5 :
5. Use place value understanding to round decimals to thousandths.
Subject: Mathematics (5)
Title: Rounding Decimals StudyJam
URL: https://studyjams.scholastic.com/studyjams/jams/math/decimals-percents/rounding-decimals.htm
Description:

In this interactive activity, students will be led through steps to round decimals to the nearest whole number using a number line. There are teaching activities as well as practice activities available. A handout that reviews the steps taught during the activity can be printed. After utilizing this resource, the students can complete the short quiz to assess their understanding.



ALEX Classroom Resources: 2

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