Question

va rog!!!dau coroana ​

Answer 1

Răspuns:

b)

$15 {}^{2} = 225 \\ 225 - 11 = 214$

c)

${7}^{0} = 1 \\5 - 1 = 4$

d)

$2 \times 2 {}^{2} \times 2 {}^{30} - 2 {}^{33} \\ = 2 {}^{1 + 2 + 30 - 33} = 2$

e.

$7 {}^{80} \div 7 {}^{78} = 7 {}^{80 - 78} = 7 {}^{2} = 49$

f.

${10}^{8} \div {10}^{7} = {10}^{8 - 7} = 10 {}^{1} = 10$

g.

${10}^{3} - 10 - 90 = {10}^{3 - 1} - 90 = {10}^{2} - 90 = 100 - 90 = 10$

h.

$( {2}^{40} ) {}^{2} \div {2}^{77} = {2}^{40 \times 2} \div {2}^{42} = {2}^{80} \div {2}^{77} = {2}^{80 - 77} = {2}^{3} = 8$

I.