Question

Tính

1) 2².25.17.+5.20.27+10².56

2) 132-[116-(132-128²)]

3) 4.5²-81:3²

4) 31.65+31.35-500-5²

5) 12+15+18+...+90=?

Answer 1

1) 2².25.17.+5.20.27+10².56

=4.25.17+5.20.27+100.56

=100.17+100.27+100.56

=100(17+27+56)

=100.100

=10000

2) 132-[116-(132-128²)]

=132-[116-(132-16384)]

=132-[116-(-16252)]

=132-(116+16252)

=132-16368

=-16236

3) 4.5²-81:3²

=4.25-3⁴:3²

=100-3^4-2

=100-3²

=100-9

=91

Answer 2

A)10000

B)16236

c)91

mk nha!

Answer 3

=10000

=16236

=91

k mk mk k lại

Answer 4

A, 4.25.17+5.20.27+100.56

=100.17+100.37+100.56

=1700+3700+5600

=11000