-(-7+8-9)-(42)
=7-8+9-8
-=1 + (9-8)
=-1 + 1
=0
Vậy GTBT = 0
-(-7+8-9)-(42)
=7-8+9-8
-=1 + (9-8)
=-1 + 1
=0
Vậy GTBT = 0
tinh nhanh
a, 13-18-(-42)-15
b,369-4.(-5)+4.(-8)
c,-12.(-13)+13.(-29)
d,323-6.[3-7.(-9)]
giai cau nao ma cac bn biet cung dc
tinh tong A=1-5/6+7/12-9/20+11/30-13/42+15/56-17/72+19/90
-5+6+7-8-9+10+11-.......+42+43=?
8 2\7 - {3 4\9 +42\7 }
tinh nhanh M=3/2-5/6+7/12-9/20+11/30-13/42+15/56-17/72
tinh nhanh A = 1*2+2*3+3*4+4*5+5*6+6*7+7*8+8*9+9*10
Tinh A=7/8:(2/9-1/18)+7/8:(1/36-5/12)
tinh bang cach thuan tien
p=3/2-5/6+7/12-9/20+11/30-13/42+15/56-17/72
ai giai tui tich
Tinh nhanh: 4/9*8/15+4/9*7/15-4/9
2 ^ 15 : 2 ^ 13 + 3 ^ 2. 2 ^ 3 - 5 ^ 2 - 2 ^ 0
81 . ( 27 + 9 ^ 15) : (3 ^ 5 + 3 ^ 32)
(4 ^ 42 .123 - 23 . 4 ^ 42) : (4 ^ 15 . 4 ^ 27)
(15 . 3 ^ 7 - 3 ^ 8) : (4 . 9 ^ 4)
(100 . 5 ^ 7 + 5 ^ 11 : 25 ) : ( 5 . 5 ^ 13 : 25 ^ 2)
( 2 ^ 5 . 3 ^ 6 . 5 ^ 7 + 2 ^ 6 . 3 ^ 7 . 5 ^ 8 ) : ( 2 ^ 4 . 3 ^ 5 . 5 ^ 6)
(4 ^ 5 . 10 . 5 ^ 6 + 2 ^ 8 . 25 ^ 5) : ( 2 ^ 8 . 5 ^ 4 + 5 ^ 4 + 5 ^ 7 . 2 ^ 5)
tặng 2 like cho người giải !!!