A free Grade 1 math worksheet on doubling and halving: adding a number to itself (double 4 is 8), splitting an even number into two equal parts (half of 10 is 5), using doubles to solve near doubles (6 + 7 is double 6 plus 1), and solving simple sharing and doubling word problems. Includes a timed lesson plan, a six-activity worksheet, an editable Word version and answer key.
Children learn that to double a number you add it to itself, and to halve a number you split it into two equal groups. They use counters and pictures to see that doubling and halving undo each other: double 5 is 10 and half of 10 is 5. They practice doubles facts to 20, split even numbers into two equal parts, use a double they know to work out a near double, and solve short word problems about sharing fairly between two friends.
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Support: keep counters and a ten frame on the table and work with doubles to 5 + 5 first. Challenge: double numbers to 20 (double 12 is 24) and explain why odd numbers cannot be shared into two equal whole groups.
Activities 1 to 5 check doubling, halving and near doubles (answer key included). Activity 6 checks applying doubling and halving to word problems.
Use the word double when you add a number to itself and half when you share into two equal groups. Children who hear both words with the same counters soon notice that halving undoes doubling.
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