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E:\Working\Focus_Learning\Math_Genius_3_(11-09-2024)\Open_Files\CHAP_03
\ 12-Sep-2024 Surender Prajapati Proof-5 Reader’s Sign _______________________ Date __________

9. 7034 persons visited the zoo in the last three days of a week. If 3548 and 1698 persons
visited the zoo on Friday and Saturday respectively, how many persons visited the

zoo on Sunday?
10. Divya had `8765. She gave `1895 to her sister and `6542 to her brother. How much
money is left with her?

Encapsulate
math
SubtrACtiOn

Subtraction of 3-Digit Numbers Subtraction Properties
Without Regrouping Subtracting 0
Example: 578 – 126 = 452 Example: 45 – 0 = 45
With Regrouping Subtracting 1
Example: 452 – 246 = 206
Example: 1246 – 1 = 1245
Subtraction of a number from Itself
Subtraction of 4-Digit Numbers Example: 1248 – 1248 = 0
Subtracting 10 from a number
Without Regrouping
Example: 9999 – 6578 = 3421 Example: 493 – 10 = 483
With Regrouping Subtracting 100 from a number
Example: 2577 – 2099 = 478 Example: 2699 – 100 = 2599
Subtracting 1000 from a number
Estimating Difference Example: 2695 – 1000 = 1695
Example: Actual difference Estimated difference
t O t O Addition and Subtraction together
8 7 rounded up 9 0 Example: 4578 – 3795 + 2563 – 1789
– 6 4 rounded down – 6 0
2 3 3 0 7141 – 5584 = 1557

Mental Maths
Fill in the missing numbers. The number in the

centre of each square is the difference of the 5 even 5
fourth (unknown) number from the sum of the 29 21
three given numbers on the sides. One has been odd 16 14 13 odd
done for you.
6 6 4

21 11 13 10 25 19
even
18 8
even

64 Mathematics-3