Math, 27 agustus 2021

1. Mathematics
(Mix Counting)

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. Mr. Ronald had 120 eggs. He sold 54 eggs to
Mr. Faro. Then, Mr. Ronald’s hens laid 37
more eggs. How many eggs does Mr. Ronald
have now?

5. 1 2 0
5 4
Finish the
subtraction first.
10 + 0= 10,
10 – 4 = 6
6
6
So, 120 - 54 + 37= 103
10 + 1= 11,
11 – 5= 6
6 6
3 7
3
0
1
The result of
subtraction is
addition by 37
1 + 6 + 3 = 10
6 + 7= 13
1 10 1
120 - 54 + 37= . .
0
10
1