\(=-36\cdot80+36\cdot23-36\cdot18-36\cdot25=-3600\)
(-36). (80 – 23) + 36. (-18 – 25)
=[(-36)+36].(80 – 23).(-18 – 25)
=0 . 57 . (-43)
=0
a) 7/-25+8/25 ; 4/5+4/-18 ; 7/21+9/-36
b) 12/20-2/5 ; 2/3-(-5/6) ; 6-3/20
c)2/21*(-7/3) ; 27/28*(-21) ; -15/7*(-14/25)
Tính:
1, 7/36- 8/-9 + -2/3
2, -1/2 + 3/7 - 1/9 + -7/18 + 4/7
3, -10/3 + 13/10 - 1/6 + 1/10
4, 10/17- 5/13 - (-7/17) - 8/13 + 11/25
Tính:
1, 7/36- 8/-9 + -2/3
2, -1/2 + 3/7 - 1/9 + -7/18 + 4/7
3, -10/3 + 13/10 - 1/6 + 1/10
4, 10/17- 5/13 - (-7/17) - 8/13 + 11/25
5- ( -3 )
-5 - 3
-5 - ( -3 )
15- ( -7 )
-15 - ( -17 )
-15 - -17
25 - 36
25 - ( -36 )
-25 - ( -36 )
-25 - 36
17 - 21
17- ( -21 )
-17 - 21
-17 - (-21 )
Bài 1. Tính:
a) 35+(−78)+78
b) (−235)+5+(−45)+(−25)
c) 36+(−18)+(−19)+18+15
d) 170+(−15)+(−19)+(−25)+15
e) 86+(−34)+59+(−48)
f) (−28)+(−42)+66+42
a, ( 2354- 45 ) - 2354
b, ( 16 + 23 ) + ( 153 - 16 - 23 )
c, -3752 - ( 29 - 3632 ) - 51
d, 4524 - ( 864 - 999 ) - ( 36 + 3999 )
e, ( 1456 + 23 ) - 1456
g, ( 116 + 124 ) - ( 215 - 116 - 124 )
a, ( 2354- 45 ) - 2354
b, ( 16 + 23 ) + ( 153 - 16 - 23 )
c, -3752 - ( 29 - 3632 ) - 51
d, 4524 - ( 864 - 999 ) - ( 36 + 3999 )
e, ( 1456 + 23 ) - 1456
g, ( 116 + 124 ) - ( 215 - 116 - 124 )
a, 4524 - ( 864 - 999 ) - ( 36 + 3999 )
b, ( 1456 + 23 ) - 1456
c, ( 116 + 124 ) - ( 215 - 116 - 124 )
\(\dfrac{-1}{3}< \dfrac{?}{36}< \dfrac{?}{18}< \dfrac{-1}{4}\)
