# Common core subtraction

## Common core subtraction - counting up method of subtraction

Common core subtraction is using addition instead. Add up from the smaller number to the bigger number.

Example 1

32-12

 12 + 3 = 15 15 + 5 = 20 20 + 10 = 30 30 + 2 = 32 20

To see this step by step

## Common core subtraction step by step

Example 1

32-12

 12 Start with the lowest number

 12 + 3 Add 3 because it's then easy to get to 15

 12 + 3 =15 15 is the running total

 12 + 3 =15 Put the running total on the next line 15

 12 + 3 =15 Add 5 because it's then easy to get to 20 15 + 5

 12 + 3 =15 20 is the running total 15 + 5 =20

 12 + 3 =15 15 + 5 =20 20 Put the running total on the next line

 12 + 3 =15 15 + 5 =20 20 + 10 Add 10 because it's then easy to get to 30

 12 + 3 =15 15 + 5 =20 20 + 10 =30 30 is the running total

 12 + 3 =15 15 + 5 =20 20 + 10 =30 30 Put the running total on the next line

 12 + 3 =15 15 + 5 =20 20 + 10 =30 30 + 2 Add 2 to finally get 32

 12 + 3 =15 15 + 5 =20 20 + 10 =30 30 + 2 =32 Check the final tally equals 32

 + 3 + 5 + 10 + 2 Now add 20

Answer: 32-12=20

Answer: 32-12=20

Example 2

43-13

 13 + 2 = 15 15 + 5 = 20 20 + 10 = 30 30 + 10 = 40 40 + 3 = 43 30

To see this step by step

## Common core subtraction step by step

Example 2

43-13

 13 Start with the lowest number

 13 + 2 Add 2 because it's then easy to get to 15

 13 + 2 =15 15 is the running total

 13 + 2 =15 Put the running total on the next line 15

 13 + 2 =15 Add 5 because it's then easy to get to 20 15 + 5

 13 + 2 =15 20 is the running total 15 + 5 =20

 13 + 2 =15 15 + 5 =20 20 Put the running total on the next line

 13 + 2 =15 15 + 5 =20 20 + 10 Add 10 because it's then easy to get to 30

 13 + 2 =15 15 + 5 =20 20 + 10 =30 30 is the running total

 13 + 2 =15 15 + 5 =20 20 + 10 =30 30 + 10 Add 10 because it's then easy to get to 40

 13 + 2 =15 15 + 5 =20 20 + 10 =30 30 + 10 =40 40 is the running total

 13 + 2 =15 15 + 5 =20 20 + 10 =30 30 + 10 =40 40 Put the running total on the next line

 13 + 2 =15 15 + 5 =20 20 + 10 =30 30 + 10 =40 40 + 3 Add 3 to finally get 43

 13 + 2 =15 15 + 5 =20 20 + 10 =30 30 + 10 =40 40 + 3 =43 Check the final equals 43

 + 2 + 5 + 10 + 10 + 3 Now add 30

Answer: 43-13=30

Answer: 43-13=30

Example 3

325-38

 38 + 2 = 40 40 + 60 = 100 100 + 200 = 300 300 + 25 = 325 287

To see this step by step

## Common core subtraction step by step

Example 3

325-38

 38 Start with the lowest number

 38 + 2 Add 2 because it's then easy to get to 40

 38 + 2 =40 40 is the running total

 38 + 2 =40 Put the running total on the next line 40

 38 + 2 =40 Add 60 because it's then easy to get to 100 40 + 60

 38 + 2 =40 100 is the running total 40 + 60 =100

 38 + 2 =40 40 + 60 =100 100 Put the running total on the next line

 38 + 2 =40 40 + 60 =100 100 + 200 Add 200 because it's then easy to get to 300

 38 + 2 =40 40 + 60 =100 100 + 200 =300 300 is the running total

 38 + 2 =40 40 + 60 =100 100 + 200 =300 Put the running total on the next line 300

 38 + 2 =40 40 + 60 =100 100 + 200 =300 300 + 25 Add 25 to finally get to 325

 38 + 2 =40 40 + 60 =100 100 + 200 =300 300 + 25 =325 Check the final equals 325

 + 2 + 60 + 200 + 25 Now add 287

Answer: 325-38=287

Answer: 325-38=287

Example 4

264-128

 128 + 2 = 130 130 + 70 = 200 200 + 60 = 260 260 + 4 = 264 136

To see this step by step

## Common core subtraction step by step

Example 4

264-128

 128 Start with the lowest number

 128 + 2 Add 2 because it's then easy to get to 130

 128 + 2 =130 130 is the running total

 128 + 2 =130 Put the running total on the next line 130

 128 + 2 =130 Add 70 because it's then easy to get to 200 130 + 70

 128 + 2 =130 130 + 70 =200 200 is the running total

 128 + 2 =130 130 + 70 =200 200 Put the running total on the next line

 128 + 2 =130 130 + 70 =200 200 + 60 Add 60 because it's then easy to get to 260

 128 + 2 =130 130 + 70 =200 200 + 60 =260 260 is the running total

 128 + 2 =130 130 + 70 =200 200 + 60 =260 Put the running total on the next line 260

 128 + 2 =130 130 + 70 =200 200 + 60 =260 260 + 4 Add 4 to finally get to 264

 128 + 2 =130 130 + 70 =200 200 + 60 =260 260 + 4 =264 Check the final equals 264

 + 2 + 70 + 60 + 4 Now add 136

Answer: 264-128=136

Answer: 264-128=136

OR

 128 + 100 = 228 228 + 30 = 258 258 + 2 = 260 260 + 4 = 264 136

## Common core subtraction step by step

Example 4

264-128

 128 Start with the lowest number

 128 + 100 Add 100 because it's an easy jump to 228

 128 + 100 =228 228 is the running total

 128 + 100 =228 Put the running total on the next line 228

 128 + 100 =228 Add 30 because it's a round number to get to 258 228 + 30

 128 + 100 =228 228 + 30 =258 258 is the running total

 128 + 100 =228 228 + 30 =228 258 Put the running total on the next line

 128 + 100 =228 228 + 30 =258 258 + 2 Add 2 because it's then easy to get to 260

 128 + 100 =228 228 + 30 =258 258 + 2 =260 260 is the running total

 128 + 100 =228 228 + 30 =258 258 + 2 =260 Put the running total on the next line 260

 128 + 100 =228 228 + 30 =258 258 + 2 =260 260 + 4 Add 4 to finally get to 264

 128 + 100 =228 228 + 30 =258 258 + 2 =260 260 + 4 =264 Check the final equals 264

 + 100 + 30 + 2 + 4 Now add 136

Answer: 264-128=136

Answer: 264-128=136