Add and subtract with written methods worksheet

The KS2Gems 2022 worksheet for Year 7 students is designed to enhance their mathematical skills in addition and subtraction through engaging activities. The primary objective is to enable students to add and subtract numbers up to three digits using the formal written methods of columnar addition and subtraction. In Activity 1, students will require random three-digit and two-digit number cards, along with 0-9 digit cards. They will practice selecting two cards and adding the numbers using the column method. Their understanding is further checked by a partner who uses the inverse operation to confirm the calculation's accuracy. Variations of this activity include using cards with different numbers of digits to add complexity to the task.

Activity 2 focuses on the creative aspect of number manipulation, where students use 0-9 digit cards to make two three-digit numbers that meet specific criteria such as forming an odd number, an even number, or a multiple of 5 or 10. They also aim to achieve the largest or smallest possible total and numbers within certain ranges. This activity encourages strategic thinking as students share their methods and results. In Activity 3, students are presented with both correct and incorrect columnar addition and subtraction calculations. They must critically assess each calculation to identify and correct any errors. Finally, Activity 4 introduces an intriguing challenge where students take a three-digit number, reverse the tens and ones digits, and then find the difference. They continue by adding the digits of the answer and repeating the process until only one digit remains. Working in pairs, students discuss patterns and exceptions in their findings, fostering a deeper understanding of number properties and relationships.