=(34.25-32.34)-(25.34-25.32)
=34(25-25)-32(34-25)
=0-32.9
=-288
34 . ( 25 -32 ) - 25 ( 34 - 32) =-288
= 34 . 25 - 34 . 32 - 25 . 34 - 25 . 32
= 34 . 32 - 25 . 32
= ( 34 - 25 ) .32
= 9 . 32
= 288
=(34.25-32.34)-(25.34-25.32)
=34(25-25)-32(34-25)
=0-32.9
=-288
34 . ( 25 -32 ) - 25 ( 34 - 32) =-288
= 34 . 25 - 34 . 32 - 25 . 34 - 25 . 32
= 34 . 32 - 25 . 32
= ( 34 - 25 ) .32
= 9 . 32
= 288
a)x-(32-27)=3x-(32+x)
b)45-(2x-37)=+x-54
c)42-(3-x)=25-34
d)(25-2x)-34=x-54
Tính hợp lí:
a, 25 - (-75) + 32 - (32+75)
b, 34 . (15-10) -15 . (34-10)
a){100:[45-45:(-9)]-32}.5-2.52
b)(25-16-32).2024
c)(34-42-2023).1280
Tìm x, biết:
a ) x = 5 6 + − 2 3 ; b ) x = − 4 3 + − 7 5 ; c ) x = 3 4 + − 1 6 + 2 5 ; d ) x 12 = 3 4 + − 7 6 ; e ) x 6 = 3 2 + − 7 15 ; f ) 11 8 + 13 10 = 107 x
1.Tính nhanh
a.(-57).(67-34)-67.(34-57)
b.(-4).125.(-25).(-6).(-8)
c.(-98).(1-246)-246.98
d.237.(-26)+26.137
e.63.(-25)+25.(-23)
g.29.(19-3)-19.(29-13)
h.31.72-31.70+(-31).2
i.25.(32+47)-32.(25+47)
k.(135-35).(-37)+37.(-42-58)
Giúp mk nha cảm ơn nhìu
1.Tính nhanh
a.(-57).(67-34)-67.(34-57)
b.(-4).125.(-25).(-6).(-8)
c.(-98).(1-246)-246.98
d.237.(-26)+26.137
e.63.(-25)+25.(-23)
g.29.(19-3)-19.(29-13)
h.31.72-31.70+(-31).2
i.25.(32+47)-32.(25+47)
k.(135-35).(-37)+37.(-42-58)
Giúp mk nha cảm ơn nhìu
Tính nhanh:
a/ 74 . ( 32 + 5 ) - 32 . ( 74 + 5 )
b/ -17 . 25 + 34 . 26 - 17 . 49
GIẢI CHI TIẾT NHA (
34+(9-21)=3417-(x+3417)
x-{55-[49+(-28-x)]}=13-{47[25-(32-x)]}
Tính các lũy thừa sau:
a) 22 ; 23 ; 24 ; 25 ; 26
b) 32 ; 33 ; 34 ; 35
c)42 ; 43 ; 44
d)52 ; 53