F.1數學!!!!!共5題在內

1. A and B are two consecutive numbers(B<A). Half of B exceeds one-fourth of A by 1. Find the values of A and B.

Let x be B and (x+1) be A.
0.5x - 0.25x =1
x(0.5-0.25)=1
x=4
Therefore, A=4+1=5 and B=4.

2. Write down the place (value?) of 2 in each of the following denary numbers:
a) 1 132
10^0
=1

b) 215
10^2
=100

3. Write the following as denary numbers:
a) 4x10^2+8x10+1
481
b) 5x10^4+2x10^3+3x10+1
52031

4. Represent each of the following by a binary numeral:
a) 1x2^2+1x2+1x1
111(2)
b) 1x2^3+0x2^2+1x2+0x1
1010(2)

5. Represent each of the following by a hexadecimal numeral:
a) 3x16^2+10x16^1+11
3AB(16)
b) 8x16^3+0x16^2+1x16^1+15
801F(16)