Multiplication worksheets
Practice products of two whole numbers from the range you choose. The answer key lists each product.
Factors and multiples worksheets
Twelve numbers a page to write every factor pair of, or the first ten multiples of; twenty questions such as “Is 56 a multiple of 7?”; or thirty numbers to 100 to circle as prime or composite. The sheets hold the numbers that catch children out: a square number and a prime among the factor pairs, near misses among the multiples to check, and odd numbers that look prime. Answer key. New numbers each time.
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Which sheet to choose
In the Common Core, factor pairs, multiples, and prime and composite numbers from 1 to 100 are grade 4 work. Start with the first ten multiples, which is counting up in the times tables. Then whether a number is a multiple, then factor pairs. Prime or composite comes last, because it rests on the factor pairs.
Factors and multiples
A factor divides a number exactly: 3 is a factor of 24, because 3 × 8 = 24. A multiple is a number times a whole number: 24 is a multiple of 3, and of 8, so a number is a multiple of each of its factors. To find every factor pair, start with 1 × 24 and go up: 2 × 12, 3 × 8, 4 × 6. The next would be 6 × 4, the same pair turned round, so stop there. A square number has a pair that is one number twice, 36 = 6 × 6, written once.
Prime or composite
A prime number has exactly two factors, 1 and itself, as 2, 3, 5, 7, 11 and 13. A composite number has more than two, as 9 = 3 × 3. The number 1 is neither, because it has only one factor. An odd number can still be composite: 51 = 3 × 17 and 91 = 7 × 13 look prime but are not.
Related printables 12
Addition worksheets
Add pairs of whole numbers from your chosen range. Write each sum in the blank and check it against the answer key.
Subtraction worksheets
Subtract the smaller whole number from the larger one. Answers are zero or positive, with a separate key for checking.
Division worksheets
Divide a whole-number product by one of its factors. Every question has a whole-number answer; these sheets do not use remainders.
Fractions worksheets
Add two fractions with the same denominator. The answer key reduces each result by its greatest common divisor.
Telling time worksheets
Read an analogue clock and write its time. Questions use five-minute intervals, with the hour and minute in the answer key.
Counting money worksheets
Count the coins and write the total in cents: pennies, nickels, dimes and quarters drawn at their real size, six groups a page, totals under a dollar, with the answers on the key. Leave out the quarters for an easier sheet. New coins each time.
Number bonds worksheets
Number bonds to 10: the whole in the top circle, its two parts below, and one of the three left empty to fill in. Choose the largest whole, up to 100, and how many bonds; the answer key is on the last page.
Place value worksheets
Place value practice with numbers of 2 to 5 digits: half the questions ask what one digit is worth, as the 4 in 3,482 is worth 400, and half ask for the number in expanded form, as 3,000 + 400 + 80 + 2. The answer key is on the last page.
Measuring length worksheets
Six lines drawn at their true length, to measure with a ruler from the left end and write down to the nearest half inch, then two lines to draw at a given length, with a ruler to cut out at the foot of the page and the answers on page 2. Choose whole, half, quarter or eighth inches, or whole or half centimetres.
Measuring angles worksheets
Six angles a page, drawn at their true size from 10 to 170 degrees in steps of 5, to measure with a protractor and circle as acute, right or obtuse, with the answers on the key. One arm lies flat to start, pointing left or right; on the harder sheet both arms turn. New angles each time.
2D shapes worksheets
Eight flat shapes a page to name, and to count the sides and corners of: triangle, square, rectangle, rhombus, trapezoid, pentagon, hexagon, octagon, circle and oval, with the answers on the key. On the harder sheet each shape is turned and the triangles and rectangles change shape, so the name rests on the sides. New shapes each time.
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