Question

[Đinh Quang Dũng]

1)Thực hiện phép tính:

a)     22 – 3	b)    62- 33
c)     22 . 52 – 34	d)    5 2 .. 7- 4.32
e)     {[(32 + 1).10 – (8:2 + 6)]:2} + 55 –(10:5)3	f)      {[(10 – 2.3).5] + 2 – 2 .6}:2 +(4.5)2
g)     100 – [60 – (9 -2)2].32	h)    (15.3 – 21):22 + 108 – 13

Answer 1

[Đỗ Phương Linh]

a) 2/3-3=4-3=1

b)6/2-3/3=36-27=9

c)2/2.5/2-3/4=4.10-81=40-81=-41

d)5/2.7-4.3/2=10.7-4.9=70-36=34

e){[(3/2+1).10-(8:2+6)]:2}+55-(10:5)/3={[(9+1).10-(8:2+6)]:2}+55-(1000:125)={[10.10-10]:2}+55-8={90:2}+55-8=45+55-8=92

f){[(10-2.3).5]+2-2.}:2+(4.5)/2={[(10-2.3).5]+2-2.6}:2+(16.25)={[4.5]+2-2.6}:2+400={20+2-2.6}:2+400={20+2-12}:2+400=10:2+400=5+400=405

g)100-[60-(9-2)/2].3/2=100-[60-(81-4)].9=100-[60-77].9=100-(-17).9=100-(-153)=253

h)(15.3-21):2/2+108-1/3=(15.3-21):4+108-1=(45-21):4+108-1=24:4+108-1=6+108-1=113

hok tốt!