Decimals

Worksheets on decimals, each for one lesson. A decimal is introduced as place value continuing to the right: tenths, hundredths and thousandths on a strip, a hundred grid and a metre, written as fractions too.

What Is a Decimal

• PDFTenthsstrip, metre, number line · 2 pagesPRI
• PDFHundredths and Thousandthshundred grid, reading and writing, who is right · 3 pagesPRI
• PDFPlace Value in Decimalsbase-ten blocks, table, exchanging and splitting · 2 pagesPRI

Number Line, Comparing and Rounding

• PDFDecimals on the Number Linezooming in from tenths to thousandths, the number halfway · 2 pagesPRI
• PDFComparing and Ordering Decimalsplace by place from the left, who is right, a race · 2 pagesPRI
• PDFRounding Decimalsthe closer number on a line, rounding twice, estimating a price · 2 pagesPRI

Adding and Subtracting

• PDFAdding and Subtracting Decimals with Modelshundred grid, going past 1, mental calculation · 2 pagesPRI
• PDFWritten Addition and Subtraction of Decimalspoint under point, adding zeros, find the mistake · 2 pagesPRI

Multiplying and Dividing by 10, 100 and 1000

• PDFMultiplying and Dividing by 10, 100 and 1000digits moving in the place value table, zeros, units of measure · 2 pagesPRI

Multiplying

• PDFMultiplying a Decimal by a Whole Numberrepeated addition, the grid, placing the point by estimating · 2 pagesPRI
• PDFMultiplying Decimalsarea model, fractions, is the product greater or smaller · 2 pagesPRI

Dividing

• PDFDividing a Decimal by a Whole Numberequal shares, tenths and hundredths, short division · 2 pagesPRI
• PDFDividing by a Decimalhow many times it fits, scaling both numbers, is the answer greater or smaller · 2 pagesPRI

Fractions and Percentages

• PDFDecimals, Fractions and Percentagesthree forms of one number on a grid, key pairs, ordering · 2 pagesPRI

Review

• PDFWho Is Right? Mistakes with Decimalscommon mistakes from the whole topic, your own mistake, self-check · 3 pagesPRI

The sheets “Fractions as Decimals” and “Division Gives a Decimal” are in the Fractions topic, under Fraction and Division.

The free apps Decimal Grid (tenths, hundredths and thousandths on a hundred grid), Decimal Zoom (a zooming number line), Place Value Blocks (decimals with base-ten blocks) and Number Line go with the sheets.