Question

2.
11
1. (1111111)
Without actually finding the squares, fill in the blanks :
2. 45² – 44² =
1. 18² – 17² =
3. 312-302
Without actual addition, find the sum :​

Answer 1

Answer:

99, 35 & 66

Step-by-step explanation:

We will use the identity a²-b² = (a+b)(a-b)

45² – 44² =  (45+44)(45-44) = 99x1=99

18² – 17² =  (18+17)(18-17) = 35x1 = 35

31^2-30^2 = (31+30)(31-30) = 61x1 = 61

Answer 2

Step-by-step explanation:

1)99

2)35

3)61

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