Bài 1: tính nhanh:
a, A = -3752 – (29- 3632 ) -51
b, B= – (8712 – 75) + [ 721 – (-25) ]
c, C = 983 -(83 – 125) + (-25)
d, D = -124 – (79 -124 ) – 121
Bài 1: tính nhanh:
a, A = -3752 – (29- 3632 ) -51
b, B= – (8712 – 75) + [ 721 – (-25) ]
c, C = 983 -(83 – 125) + (-25)
d, D = -124 – (79 -124 ) – 121
a)7303
b)9383
c)1000
d)-200
a, A = -3752 – (29- 3632 ) -51
A=-3752-29+3632-51
A=(-3752+3632)+(-29-51)
A=-120-80
A=-200
b, B= – (8712 – 75) + [ 721 – (-25) ]
B=-8712+75+721+25
B=(-8712+721)+(+75+25)
B=-7991+100
B=-7891
c, C = 983 -(83 – 125) + (-25)
C=983-83+125-25
C=900+100
C=1000
d, D = -124 – (79 -124 ) – 121
D=-124-79+124-121
D=(-124+124)+(-79-121)
D=-200