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Created byALL SORTS OF MATH
Number Talks Strategies Posters
COMMON CORE MATHEMATICS3rd 4th 5th
2016
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ADDITION STRATEGY
DoublesThe Doubles help with the Near Doubles.
25 + 25
3rd 4th
2016
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ADDITION STRATEGY
DoublesThe Doubles help with the Near Doubles.
250 + 250
4th 5th
25 + 26 25 + 26 = 25 + (25 + 1)
25 25 1
25 + 26
ADDITION STRATEGY
Near DoublesThe Doubles help with the Near Doubles.
2016
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3rd 4th
250 + 260 250 + 260 = 250 + (250 + 10)
250 250 10
250 + 260
ADDITION STRATEGY
Near DoublesThe Doubles help with the Near Doubles.
2016
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4th 5th
2016
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ADDITION STRATEGY
Add Up in ChunksKeeping one addend whole, add the second addend in friendly chunks.
23 + 12+10 +2
3rd 4th
23 33 35
2016
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ADDITION STRATEGY
Add Up in ChunksKeeping one addend whole, add the second addend in friendly chunks.
209 + 124+100 +20
4th 5th
+1 +3
209 309 329 330 333
2016
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21 + 14
20 1 10 4
3rd 4th
20 + 10 = 301 + 4 = 5
30 + 5 = 35
ADDITION STRATEGY
Place ValueDecompose and add by the place value.
2016
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124 + 235
4th 5th
100 + 200 = 30020 + 30 = 50
4 + 5 = 9300 + 50 + 9 = 359
ADDITION STRATEGY
Place ValueDecompose and add by the place value.
2016
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17 + 19–116
+1+ 20
ADDITION STRATEGY
CompensationMake friendlier numbers by removing from one addend, then adding
the same amount to the other addend.
3rd 4th
= 36
2016
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127 + 119–1
126+1
+ 120
ADDITION STRATEGY
CompensationMake friendlier numbers by removing from one addend, then adding
the same amount to the other addend.
4th 5th
= 246
2016
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18 + 62 4
ADDITION STRATEGY
Make Friendly NumbersMake a friendly number by decomposing another addend.
4th3rd
18 + 2 = 2020 + 4 = 24
2016
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4th
116 + 118
118 + 2 = 120
5th
4 2
120 + 114 = 234
ADDITION STRATEGY
Make Friendly NumbersMake a friendly number by decomposing another addend.
2016
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ADDITION STRATEGY
Make a TenMake a ten by decomposing another addend.
18 + 6
2 4
4th3rd
10 + (8 + 2) = 2020 + 4 = 24
2016
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138 + 116
4th 5th
2 4(130 + 8) + (110 + 2 + 4)
130 + 110 + (8 + 2) + 4240 + 10 + 4
250 + 4 = 254
ADDITION STRATEGY
Make a TenMake a ten by decomposing another addend.
SUBTRACTION STRATEGY
Add UpStart with the subtrahend, add up in friendly chunks to the minuend.
+1 +10
39 40 50
2016
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4th3rd
11
50 – 39 = 11
SUBTRACTION STRATEGY
Add UpStart with the subtrahend, add up in friendly chunks to the minuend.
+1 +30
69 70 100 123
2016
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4th 5th
+23
123 – 69 = 5454
2016
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SUBTRACTION STRATEGY
RemovalStart with the minuend, remove the subtrahend in friendly chunks.
–2
–8
–6
4th3rd
22 – 8 = 14
14 20 22
2016
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SUBTRACTION STRATEGY
RemovalStart with the minuend, remove the subtrahend in friendly chunks.
–22
– 28
–6
4th 5th
122 – 28 = 94
94 100 122
2016
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29 30 53 54
4th3rd
53 – 29 = 54 – 3054 – 30 = 24
24
SUBTRACTION STRATEGY
Constant DifferenceChanging both the minuend and subtrahend by the same amount.
2016
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49 50 117 118
SUBTRACTION STRATEGY
Constant DifferenceChanging both the minuend and subtrahend by the same amount.
4th 5th
117 – 49 = 118 – 50118 – 50 = 68
68
2016
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SUBTRACTION STRATEGY
Adjust One NumberAdjusting one number to make a friendlier problem.
4th3rd
43 – 29+1
43 – 30 = 1313 + 1 = 14
2016
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43 – 29
–30
+ 1
4th3rd
+1
43 – 30 = 1313 + 1 = 14
13 14 43
SUBTRACTION STRATEGY
Adjust One NumberAdjusting one number to make a friendlier problem.
2016
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4th 5th
103 – 59+1
103 – 60 = 4343 + 1 = 44
SUBTRACTION STRATEGY
Adjust One NumberAdjusting one number to make a friendlier problem.
2016
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103 – 59
–60
+ 1
4th 5th
+1
103 – 60 = 4343 + 1 = 44
43 44 103
SUBTRACTION STRATEGY
Adjust One NumberAdjusting one number to make a friendlier problem.
2016
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75 – 38
4th
SUBTRACTION STRATEGY
Place ValueDecompose and subtract by the place value
3rd
70 – 30 = 405 – 8 = – 3
40 – 3 = 37
2016
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4th 5th
245 – 168200 – 100 = 100
40 – 60 = – 205 – 8 = – 3
100 – 20 – 3 = 77
SUBTRACTION STRATEGY
Place ValueDecompose and subtract by the place value
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