Question

1)10^2-3^2 2)(10-3)^2 3)-5^2-(-1)^6 4)-7^3+(-2)^3 5)0,2×3^2-0,3×2^4 6)8×0,5^3+25×0,2^2

Answer 1

1) 10^2-3^2=100-9=91
2)(10-3)^2=72=49
3)-5^2+1^6=25+1=26
4)-7^3+(-2)^3=-343-8=-351
5)0,2*3^2-0,3*2^4=0,2*9-0,3*16=1,8-4,8=-3
6)8*0,5^3+25*0,2^2=8*0,125+25*0,04=1+1=2

Answer 2

Let's solve each of the given expressions step by step:

1. 10^2 - 3^2 = 100 - 9 = 91

2. (10 - 3)^2 = 7^2 = 49

3. -5^2 - (-1)^6 = -25 - 1 = -26

4. -7^3 + (-2)^3 = -343 + (-8) = -351

5. 0.2 × 3^2 - 0.3 × 2^4 = 0.2 × 9 - 0.3 × 16 = 1.8 - 4.8 = -3

6. 8 × 0.5^3 + 25 × 0.2^2 = 8 × 0.125 + 25 × 0.04 = 1 + 1 = 2

So the solutions for each expression are:

1. 91
2. 49
3. -26
4. -351
5. -3
6. 2