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Mathematics
(Mix Counting)
8 4 9
7 5
849 - 75 + 16= . . .
Finish the
subtraction first.
9 - 5= 4
4
7
So, 849 - 75 + 16= 790
7
10 + 4= 14,
14 – 7= 7
7 7 4
1 6
0
9
7
The result of
subtraction is
addition by 16
1 + 7 + 1 = 9
4 + 6= 10
4 cannot be
subtracted by 7. So,
we borrow 1 tens
from number 8.
7 10 1
6 2 5
5 3
625 - 53 + 143= . . .
Finish the
subtraction first.
5 - 3= 2
2
7
So, 625 - 53 + 143= 715
5
10 + 2= 12,
12 – 5= 7
5 7 2
1 4 3
5
1
7
The result of
subtraction is
addition by 143
7 + 4 = 11
2 + 3= 5
2 cannot be
subtracted by 5. So,
we borrow 1 tens
from number 6.
5 10 1
1 + 5 + 1 = 7
4 7 1
2 4 3
471 - 243 + 59= . . .
Finish the
subtraction first.
10 + 1= 11,
11 – 3= 8
8
2
So, 471 - 243 + 59= 287
2
6 – 4= 2
2 2 8
5 9
7
8
2
The result of
subtraction is
addition by 59
1 + 2 + 5 = 8
8 + 9= 17
1 cannot be
subtracted by 3. So,
we borrow 1 tens
from number 7.
6 10 1
4 – 2= 2
Math
Math
Math

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Math

  • 2. 8 4 9 7 5 849 - 75 + 16= . . . Finish the subtraction first. 9 - 5= 4 4 7 So, 849 - 75 + 16= 790 7 10 + 4= 14, 14 – 7= 7 7 7 4 1 6 0 9 7 The result of subtraction is addition by 16 1 + 7 + 1 = 9 4 + 6= 10 4 cannot be subtracted by 7. So, we borrow 1 tens from number 8. 7 10 1
  • 3. 6 2 5 5 3 625 - 53 + 143= . . . Finish the subtraction first. 5 - 3= 2 2 7 So, 625 - 53 + 143= 715 5 10 + 2= 12, 12 – 5= 7 5 7 2 1 4 3 5 1 7 The result of subtraction is addition by 143 7 + 4 = 11 2 + 3= 5 2 cannot be subtracted by 5. So, we borrow 1 tens from number 6. 5 10 1 1 + 5 + 1 = 7
  • 4. 4 7 1 2 4 3 471 - 243 + 59= . . . Finish the subtraction first. 10 + 1= 11, 11 – 3= 8 8 2 So, 471 - 243 + 59= 287 2 6 – 4= 2 2 2 8 5 9 7 8 2 The result of subtraction is addition by 59 1 + 2 + 5 = 8 8 + 9= 17 1 cannot be subtracted by 3. So, we borrow 1 tens from number 7. 6 10 1 4 – 2= 2