Math Drills

Structure of Decimals

B-3

Reading (Comparing Size)

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What this worksheet covers

Grade: Grade 4 (Elementary School)
Topic: Adding and Subtracting Decimals
Worksheet: Structure of Decimals

A single blank sits inside one sentence and a figure is written into it. Place Value and Definition moves back and forth over how many 0.001s a number gathers, and Comparing Sizes asks for the greater or the lesser of two. 10 to 1000 Times, 1/10 to 1/1000 confirms how the places shift, and Number Line has fine divisions read.

Because Comparing Sizes asks for the greater and the lesser both, deciding that the number with more digits is bigger goes wrong in either direction. Look down from the highest place one digit at a time and the answer is settled at the first place where they differ. For 0.478 and 0.5 the tenths, 4 against 5, decide it alone, and the length in digits is no clue at all.

Adding and Subtracting Decimals opens with this lesson, and so far numbers are only being rewritten. From Addition onward the work enters the column layout with the places lined up. The order of the places grasped here is the clue there.