Subtraction

The videos below show you the calculation methods we teach. Each written method is designed to easily convert to a mental method. We will gradually add more when we can.

Would you like to make your own and add it to the page? Email it to learning@gorseland.net

Big Maths Subtraction Progress Drive.

Step 1: I know when to take some away

Step 2: I know to take some away, then count how many are left

Step 3: I take away the right amount (CLIC2 Q10)

Step 4: … And can count how many are left

Step 5: Take away numbers of objects to 10 (CLIC3 Q10)

Step 6: Read a subtraction number sentence [“6 – 4 =”] (CLIC5 Q9)

Step 7: Arrange a subtraction number sentence [6 blocks – 4 blocks]

Step 8: Solve a subtraction number sentence [6 - 4]

Step 9: Solve subtraction on a number line [6 - 4] (CLIC5 Q10)

Step 10: Take 1 from a number up to 20 [16 - 1]

Step 11: Take 2 or 3 from a number up to 20 [16 - 3] (CLIC6 Q9)

Step 12: Teens number – 1d [16 - 7] (CLIC6 Q10)

Step 13: 2d tens – 10 [80 - 10] (CLIC7 Q9)

Step 14: 2d – 10 [43 - 10]

Step 15: Take a multiple of 10 from a multiple of 10 [80 - 30] (CLIC7 Q10)

Step 16: Take a 1d number from a multiple of 10 [80 - 6] (CLIC8 Q7)

Step 17a: Use ‘Learn Its’ facts to work out ‘It’s Nothing New’ [8 - 5 = 3, 18 - 5 = 13]

Step 17b: 2d -1d (without bridging) [48 - 5] (CLIC8 Q8)

Step 18: 2d -1d (with bridging) [43 - 7] (CLIC8 Q9)

Step 19: 3d -1d (with bridging) [343 - 7] (CLIC8 Q10)

Step 20: Spot the next multiple of 10 [78 … 80]

Step 21: Count to the next multiple of 10 [73 … 80… 7]

Step 22: Find the 1d gap to the next multiple of 10 [80 - 73]

Step 23: Find the 1d gap from a multiple of 10 [84 - 80]

Step 24: 2d - 2d (crossing a multiple of 10) [84 - 73]

Step 25: 2d – 2d tens [46 - 20]

Step 26: Find the 2 gaps in 2d - 2d [46 - 17 = __ + __]

Step 27: 2d - 2d = 2d (with bridging) [46 - 17] (CLIC9 Q7, 9 Q10 col, 10 Q10 col)

Step 28: Take a 2d number from 100 (Jigsaw numbers) [100 - 35] (CLIC10 Q7)

Step 29: Take 100 from any 3d number [682 - 100]

Step 30: 3d - 2d (with bridging) [682 - 35] (CLIC11 Q10)

Step 31: 4d - 2d (with bridging) [4628 - 35] (CLIC13 Q9 col, 16 Q8)

Step 32: 3d - 3d (with bridging) [628 - 235] (CLIC17 Q6)

Step 33: 3d – 3d as money (with bridging) [£6.28 - £2.35]

Step 34: Subtract numbers with 100ths [6.28 - 2.35]

Step 35: Subtract numbers with 10ths [4.5 - 1.7] (CLIC18 Q8)

Step 36: Subtract any whole number [4603 – 167]

Step 37: Subtract numbers with different decimal places [3.7 – 1.78] (CLIC19 Q4 & Q8)