Decrease Subtract Difference Minus Less Reduce Take from Subtrahend

Subtraction Calculation subtract equals minuend subtrahend difference 9 – 3 = 6

Real Life Subtraction Use real life every day situations, drawing children’s attention to every day situations that show subtraction. E.g: Giving milk out, seeing the cartons be taken away, how many left? Having a bowl of ten sweets, how many have you eaten? How many are left? If you give me one how many are left?

Subtracting through songs 6 8 3 2 1 4 5 9 7 6 3 2 1 4 5 2 1 10 green bottles 6 green bottles 2 green bottles 6 8 3 2 1 4 5 9 7 3 2 1 4 5 9 green bottles 1 5 green bottles 6 8 3 2 1 4 5 7 1 green bottle 3 2 1 4 8 green bottles 4 green bottles 6 3 2 1 4 5 7 3 2 1 No green bottles 7 green bottles 3 green bottles

One less Can you take one away? How many are left? So, one less than seven is six.

1 less 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Problem: What is one less than 9? Vocabulary Less

Subtraction with objects 8-4=4 5-2=3

5-4=1 Subtracting using fingers I then put 4 down. This will then give me 1. First I start with 5 fingers

Number Bonds Additions Subtractions 10+0=10 0+10=10 10-0=10 10-10=0 9+1=10 1+9=10 10-1=9 10-9=1 8+2=10 2+8=10 10-2=8 10-8=2 7+3=10 3+7=10 10-3=7 10-7=3 6+4=10 4+6=10 10-4=6 10-6=4 5+5=10 10-5=5

Additions Subtractions 1+0=1 0+1=1 1-0=1 1-1=0 2+0=2 0+2=2 2-0=2 2-2=0 1+1=2 2-1=1 3+0=3 0+3=3 3-0=3 3-3=0 2+1=3 1+2=3 3-2=1 3-1=2 4+0=4 0+4=4 4-0=4 4-4=0 3+1=4 1+3=4 4-1=3 4-3=1 2+2=4 4-2=2

Additions Subtractions 5+0=5 0+5=5 5-0=5 5-5=0 4+1=5 1+4=5 5-1=4 5-4=1 3+2=5 2+3=5 5-2=3 5-3=2 6+0=6 0+6=6 6-0=6 6-6=0 5+1=6 1+5=6 6-1=5 6-5=1 4+2=6 2+4=6 6-2=4 6-4=2 3+3=6 6-3=3 7+0=7 0+7=7 7-0=7 7-7=0 6+1=7 1+6=7 7-1=6 7-6=1 5+2=7 2+5=7 7-2=5 7-5=2 3+4=7 4+3=7 7-3=4 7-4=3

Additions Subtractions 8+0=8 0+8=8 8-0=8 8-8=0 7+1=8 1+7=8 8-1=7 8-7=1 6+2=8 2+6=8 8-2=6 8-6=2 5+3=8 3+5=8 8-3=5 8-5=3 4+4=8 8-4=4 9+0=9 0+9=9 9-0=9 9-9=1 8+1=9 1+8=9 9-1=8 9-8=1 7+2=9 2+7=9 9-2=7 9-7=2 6+3=9 3+6=9 9-3=6 9-6=3 5+4=9 4+5=9 9-4=5 9-5=4

Subtracting by counting back using a number line.

counting back mentally Subtracting by counting back mentally 7 – 1 = 6 10 – 2 = 8 25 – 5 = 20 100 – 10 =90

Subtract a 1-digit number from a 2- digit number 17 – 5 = 24 – 3 = 16 – 6 = 23 – 7 =

Subtracting by counting up 14 – 12 = 2 +2 12 14

First subtract your tens. Partitioning 39 – 23 = 30 20 3 9 First subtract your tens. 30-20=10 Then your ones 9-3=6 Finally recombine 10+6=16

Subtracting 10 from multiples of 10 + 10

Subtracting by counting back in 10s 90 – 50 = 40 To count back in tens you need to know your 10 times tables 10,20,30,40,50,60,70,80,90,100,110 & 120. 90-50= 10 90 – 50 = 40

Subtracting 10 using a number square 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 When subtracting 10 you count back ten squares from your starting number. Now try 56-10= Make some up yourself. 27 – 10 = 17 Or you can jump to the number directly above.

Counting back in 10s -10 -10 -10 -10 68-40=28 Ones remain the same.

Subtracting 9 by subtracting 10 and adjusting. 46 - 9 First subtract 10 46-10=36 36+1=37 Then add 1

Subtracting 100 468 – 100 = 368 987 – 100 =887 635 – 100 = 535 1,786 – 100 = 1,686 What do you notice?

Finding the difference by counting up. 49-36= This question can be worked out quickly by using a number line and counting up. +9 +4 36 49 40 4+9=13.

Can you use this method to subtract 96? 93? How to calculate 127 – 95= First subtract 100 Can you use this method to subtract 96? 93? 127-100=27 27+5=32 Then add 5

Another method: 127 – 95 = 32 +20 +7 +5 95 100 120 127 5+20+7= 32

387 – 294 = 93 When you partition, it is easier to see that you borrow from the hundreds column. 300+180+7 200+ 90+4 0+90+3 =93 200 387 294 93

Subtraction by decomposition 4.Finally you are left with a 3 in the thousands column. Below there is no number to take away so you just take zero away. 3000 - 0=3000 Tip-Always start at the right and make sure your larger number is on the top. 1. First you start with the ones column 1-0=1. 1 5 3 2. Next you look at the tens column 20 - 30. This is not possible to do without borrowing one from your neighbour (left side), the hundreds. After borrowing one hundred it will make your number into 120. 120-30=90 4621 - 730 3891 1 3.Again 500-700 is not possible to do without borrowing. So borrow from neighbour (left), the thousands column, which will then make your number 1500. 1500-700=800

Subtraction of decimals 1 3 1 6 £ 14.71 7.89 £ 6.82 1 Remember to line your decimals up like shirt buttons!