Subtraction Cheat Sheet (Across Zeroes)
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1Name:
Subtraction Cheat Sheet (Across Zeroes)
One Zero
To solve a subtraction problem with a zero you must first change the zero into a larger number.
405 - 127
Lets take a look at the steps in depth below to solve the problem:
3
3
9
3
9
3
9
4 0
5
4
0 5
4 0 5
4 0 5
1
1
1
1
1
1
1
1 2
7
1 2
7
1
2
7
- 1
2 7
-
-
-
8
7
8
2
7 8
3) Hundreds- Hundreds
2) Tens - Tens.
1) Find something to borrow.
2) Ones - Ones
A.
Finally we need to
A.
Now we need to
First we need to subtract 7
Now we can borrow from
A.
A.
subtract the 1 from the
subtract the 2 from the
from 5.
the 10.
9.
3.
B.
Because 5 is less than 7 we
B.
Take one from the 10. This
B.
9 - 2 = 7
B.
3- 1 = 2.
need to borrow.
turns the 10 into a 9. Put
the one by the 5. This turns
the 5 into a 15.
Since we can not take
C.
anything from 0, we have to
C.
15 - 7 = 8
borrow from the 4 to give to
the 0.
D.
Take one from the 4. This
turns the 4 into a 3. Put the
one by the 0. This turns the 0
into a 10.
Multiple Zeros
To solve a subtraction problem with a multiple zeros you must first find a whole number to borrow from.
7,003 - 1,274
Lets take a look at the steps in depth below to solve the problem:
6
6
9
6
9
9
6
9 9
7 0 0
3
7
0 0
3
7 0
0 3
7 0 0 3
1
1 1
1
1
1
1 1
1
1 2 7
4
1 2 7 4
1 2 7
4
- 1 2 7
4
-
-
-
9
5 7 2 9
1) Find something to borrow.
2) Borrow more.
3) Borrow and Solve
4) Solve the rest
A.
Because 4 is more than 3 we
A.
Now we need to borrow
A.
Now we can borrow from
A.
Now we can do subtraction
need to borrow.
from 10.
the 10. Take one from the
like normal.
10. This turns the 10 into
Since we can not take
B.
B.
Take one from the 10.
9 - 7 = 2
B.
a 9. Put the one by the 3.
anything from 0, we have to
This turns the 10 into a 9.
This turns the 3 into a 13.
borrow from the 7 to give to
Put the one by the 0. This
9 - 2 = 7
C.
the 0.
turns the 0 into a 10.
B.
13 - 4 = 9
D.
6 - 1 = 5
Take one from the 7. This
C.
turns the 7 into a 6. Put the
one by the 0. This turns the
0 into a 10.
Math
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