Foundation Unit Addition Subtraction Children are encouraged to develop a mental picture of the number system in their heads to use for calculation. Children are encouraged to develop a mental picture of the number system in their heads to use for calculation. Children will experience equal groups of objects. They develop ways of recording calculations using pictures etc. They will begin to count in 2s They develop ways of recording calculations using pictures, etc. Multiplication They will work on practical problem solving activities involving equal sets or groups. Bead strings or bead bars can be used to illustrate addition Bead strings or bead bars can be used to illustrate subtraction including bridging through ten by counting back 3 then counting 8+2=10 back 2. They use numberlines and practical resources to support calculation and teachers demonstrate the use of the numberline. 6-2=4 They use numberlines and practical resources to support calculation. Teachers demonstrate the use of the numberline. Division Children will understand equal groups and share items out in play and problem solving. They will begin to count in 2s Written Calculations - Stage One Addition Subtraction Taking away from sets (9 – 4 = 5) 3 4 5 6 7 8 9 Stepping back along a number track Progressing to use of a prepared / numbered number line 0 1 2 3 4 5 Multiplication 6 7 8 9 10 11 12 13 14 Progressing to use of a prepared / numbered number line 0 15 Division 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Written Calculations – Stage Two Addition Subtraction (49 + 14 = 63) 49 + 10 + 4 Adding two digit and three digit numbers (Children partition 14 into 10 and 4 before making the jumps) +10 +1 Subtracting two digit and three digit numbers 49 - 14 = 35 +1 +1 +1 49 – 10 -4 (Children partition 14 into 10 and 4 before making the jumps) -1 49 59 60 61 -1 -1 -10 62 63 (129 + 26 = 155 ) 129 + 10 (Children partition 26 into two 10s and 6 units before making the + 10 jumps) +6 +10 +10 +1 +1 +1 +1 +1 +1 129 -1 139 149 150 35 36 37 38 39 49 (147 - 33 = 114) 147 - 10 (Children partition 33 into three 10s and 3 units before making the jumps - 10 - 10 -3 -1 -1 -1 -10 -10 -10 151 152 153 154 155 114 115 116 117 127 137 147 Multiplication Division Repeated addition on a number line – TU X U (12 x 4 = 48) +4 +4 +4 +4 +4 +4 +4 +4 +4 +4 +4 Divide 2 digit numbers by 1 digit numbers – find remainders +4 (23 ÷ 5 = 4 r3) -3 0 4 8 12 16 20 24 28 32 36 40 44 -5 -5 -5 -5 48 0 3 8 13 18 23 Children should be able to round the remainder up or down depending on the context Written Calculations – Stage Three Addition Subtraction Adding two digits and three digits (expanded column) Partitioning TU +T U Partitioning HTU + TU 56 + 39 625 + 48 50 30 80 600 6 9 + 15 80 + 15 = 95 600 20 40 60 Subtracting two digits and three digits (expanded column) Partitioning TU – TU Stage 1 79 – 46 5 8 + 13 600 + 60 + 13 = 673 Stage 2 83 – 47 70 70 40 30 9 6 3 = 33 80 40 30 1 Partitioning HTU - TU Stage 3 435 - 67 300 3 7 6 = 36 400 300 120 30 60 60 1 5 7 8 = 368 Use the term ‘borrowing’ Multiplication Division Number line using known times tables facts - TU x U (13 x 4 = 52) 10 3 + 40 (10x4) +4 +4 +4 0 40 44 48 52 Using the bus stop method to solve division with remainders 84 ÷ 4 X4 4 8 12 16 20 24 28 32 36 40 X6 6 12 18 24 30 36 42 48 54 60 21r2 4 ) 86 243 ÷ 6 0 3 5 R3 6) 2 ²1 ³3 Written Calculations – Stage Four Addition Subtraction Whole numbers and decimals Practice without ‘carrying’ Whole numbers and decimals Using ‘carrying’ Practice without ‘borrowing’ 354 + 245 735 + 587 496 + 47 354 245 + 599 735 587 + 1322 496 47 5 4 3 1 1 1 746 – 325 784 – 267 74 6 32 5 42 1 7 8 2 6 5 1 7 + 1 Multiplication 156 x 9 100 9 50 6 8 20 160 X 100 9 4 7 7 5 11 1 6 2 3 4 5 8 1 6 5 Using the bus stop method to solve division with remainders 84 ÷ 4 X 1 623 - 458 Division Partitioning using the grid method TU x U, HTU x U and TU x TU 23 x 8 20 3 Using ‘borrowing’ 900 3 24 50 450 100 60 0 20 4 100 80 4 6 900 400 54 1300 + = 184 00 0 50 0 50 4 + 100 4 =1404 X4 4 8 12 16 20 24 28 32 36 40 X6 6 12 18 24 30 36 42 48 54 60 21r2 4 ) 86 243 ÷ 6 0 3 5 R3 6) 2 ²1 ³3 Written Calculations - Stage Five Addition Subtraction As per Stage 4 As per Stage 4 Multiplication Division As per Stage 4 Long division HTU ÷ TU 972 ÷ 36 27 36 ) 972 - 720 252 - 252 0 Answer : 20 x 36 7 x 27 36