Stalbridge Primary School Year 3 KS2 Maths Division Children will be used to the principle of sharing through play and their real life contexts, therefore making division by sharing a pathway into understanding division. Vocabulary: Groups of, halve, share, share equally, one each, two each, three each, group in pairs, threes, tens, At this stage children will be using discrete models to solve the problems and will physically share or group the models to derive the answer Division by sharing with a remainder Grouping is a foundation to understanding and working with arrays The grouping method encourages children to look at the equation in further detail – to use grouping they need to look at the divisor (in this instance 6 and group the collection accordingly) equal groups of, ÷, divide, divided by, divided into, left, left over, division, remainder Division by sharing: 12 ÷ 4 = 3 26 ÷ 5 = 5r1 Remainder Division by grouping: 18 ÷ 6 = 3 We have three groups of 6 hearts with zero remainders, therefore the answer is 3 Division by grouping using arrays: 4 groups of 3 3 groups of 4 3 x 4 = 12 4x3 = 12 Stalbridge Primary School Arrays are a visual representation of the patterns and relationships between multiplication and division. Children should learn that halving as the inverse of doubling. This method requires children to be confident users of the subtraction operation to solve a division problem. Counting back proficiency can be developed in mental/oral starters as a whole class. KS2 Maths Division Division on a number line, using repeated subtraction: 36 ÷ 3 = 12 -3 0 3 6 9 12 15 18 21 24 27 30 33 36 Division as the inverse of multiplication: 45 ÷ 9 = 5 5 x 9 = 45 45 ÷? = 9 Remainders on a number line: 17 ÷ 3 = 5 r2 1 0 2 3 3 6 Children can count on to find the remainder 4 9 5 12 remainder 2 15 17 18 Stalbridge Primary School Year 4 KS2 Maths Division There is an emphasis on the inverse relationship between multiplication and division. Vocabulary: Key Language: Halve, share, and share equally, one each, two each, and three each…group in pairs, threes… tens, Children use knowledge of multiples of 10s and 100s to derive the answer. However, children need to understand that 6 divided by 3 is not the same as 3 divided by 6 (unlike multiplication) 96 ÷ 12 = 8 96 60 + 36 Development from the year 3 method, although arrays are also used in year 4. Some children will move away from using models and will solely use the number line. Others will use both to assist their calculation. equal groups of divide, division, divided by, divided into, remainder, factor, quotient, divisible by, inverse. Mental division (Partitioning): ÷ 12 5 + 3=8 Progressed division by grouping using a number line: 96 ÷ 6 = 16 -60 (10 groups of 6) -36 (6 groups of 6) 0 36 96 Moving to a vertical number line : 48 ÷ 4 = 12 jumps of 4 so 48 ÷ 4 =12 Understand that division is the inverse of multiplication Stalbridge Primary School KS2 Maths The Chunking Method: Division 161 ÷ 7 = How many 7’s can you remove from 44? a)Keep moving chunks of 7. b)How many chunks of 7 can you remove? c) Is there a remainder? a)How many chunks of 7 in 161? b)Remove 10 lots of 7 as our chunk size c)Keep removing chunks of (10 x 7) until you cannot. d)Use your times table knowledge to remove the last chunk Is there a remainder? e)How many chunks of 7 have you removed in total? Stalbridge Primary School Year 5 KS2 Maths Division Children need to be secure in their knowledge of subtraction for this method as it is reliant upon this operation. Vocabulary: Halve, share, share equally, one each, two each, three each group in pairs, threes… tens, equal When children become more comfortable and familiar with the chunking method they can begin to subtract larger chunks. The size of the chunks children are happy to subtract can be used for assessment. 87÷6= 14.5 15 tents are required Introduce rounding up and down with a context – is 14.5 tents an appropriate answer? Can we have ½ a tent? Children need to apply their answer to the context and round up or down accordingly. Children need to know a range of multiples to use chunking effectively. groups of divide, division, divided by, divided into, remainder, factor, quotient, divisible by, inverse Calculator Method A tent sleeps 6 people. How many tents will be needed if 87 people go to Ten Tors? Stalbridge Primary School Year 6 Some children will continue to use chunking whilst others will progress to a compact written form (short division). Children need to be confident with the chunking method before adopting the short division written method. Links to partitioning and chunking from previous years. Children estimate the answer prior to/post carrying out the calculation for selfassessment. Moving to secondary school children should have proficient use of one written method, either short division or chunking. KS2 Maths Division Vocabulary: Halve, share, share equally, one each, two each, three each group in pairs, threes… tens, equal groups of divide, division, divided by, divided into, remainder, factor, quotient, divisible by, inverse. The number line continues to be used in year 6 for division. Remembering the Inverse of Division is multiplication will aid your child’s understanding. 56 ÷ 7 = Children need to think of their 7 times table and use this to work out how many 7’s make 56. Children also need to be able to check their answers using a calculator. Progression to year 7: Formal written method: a)How many 4s in 5? 1 remainder 1 b)Carry the remainder in front of the next digit, then how many 4s in 18? 4 remainder 2 c)Carry the remainder in front of the next digit, then how many 4s in 24? 6 d)How many 4s in 584? 56 ÷ 7 = 8 Stalbridge Primary School KS2 Maths Division
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