This unit (basic ADDING and SUBTRACTING of decimals) is actually UNIT #9 of fractions in GRADE 4 as it assumes a knowledge of the prior units on fractions, particularly the DECIMALS UNIT 1 which is actually the 8th unit of fractions overall. THERE IS AN EXTREME EMPHASIS ON EQUIVALENT FRACTIONS just as there is in most of the prior fraction units. The unit also focuses greatly on the interchangeability of the usual fraction form and the new decimal form of certain fractions when performing additions and subtractions.
INCLUDED is a TEACHER's GUIDE of every teaching reference utilized by the enclosed problems as well as every (large) diagram needed by the problems. From this alone the unit can be thought through and designed. Also included is a SPECIAL RUN of level 1 (simplest) problems that basically provides you with a preview of each of the skills.
MY APPROACH TO TEACHING and to the offered UNITS on this website is to pepper the worksheets (and, optionally, the quizzes) with informational guides that serve as text-book-like how-to instructions. How the teacher puts it all together is left to that teacher's unique approach to teaching. In other words, these offerings are PROBLEM-BASED and not lesson-plan based. The difference is profound. I do not pretend to know how you should speak to your students and refuse to offer canned lesson plans--the material will serve as your own guide as well as for the students themselves.
Standards 4.NF.5 and 4.NF.6 are two of the all-important Common Core standards as they deal with the new concept of decimals. The student must be able to grasp this new terminology and form--and relate it to the concept of "fraction."
The unit should take no longer than 4 days. The problems themselves have evolved from my own experience in a charter school setting.
Four worksheets are included: they have 10, 15, 20 and 25 questions per skill (of which there are 4) depending on your needs.
Further, there are 7 assessments (each with 10 questions) of varying difficulty (level 1 is the easiest and level 4 is the most difficult).
[The problems in All WORKSHEETS and PREVIEWS are printed in difficulty (1 [easy], 2 [not so easy], 3 [proficiency] up to 4 [mastery]) order within a skill. The actual difficulty level appears slightly to the left of the DK box of each problem in a very small font. Also, instructional references appear on worksheets but are optional on quizzes.]
BUNDLES: as of this writing I have the FRACTIONS BUNDLE
You might also want to check out other 4th grade offerings here. The 4th Grade Summary
will link to a variety of other offerings and the DECIMALS UNIT 1: an INTRODUCTION
, is a possible prior unit while the
DECIMALS UNIT 3: NUMBER LINE/ORDERING
is the next (and last) logical unit concerning fractions and decimals for the 4th grade.
As a reminder, these units have been very successfully cobbled together after a decade of teaching older students what they never learned in the earlier grades.