67:4=
Tính nhanh :
a, (-67).(1- 301) - 301 . 67
b, (-4).(+4).(-125).(+25).(-8)
(-57).(67-34)-67.(34-57)
(-4).(+125).(-25).(-6).(-8)
tính cách thuạn tiện nhất
25 x 67 x 4
125 x 2 x 4
67 x 5 x 2
50 x 78 x 2
25 x 67 x 4 = ( 25 x 4) x 67 = 100 x 67 = 6700
125 x 2 x 4 = ( 125 x 4) x 2 = 500 x 2 = 1000
67 x 5 x 2 = 67 x ( 5x2) = 67 x 10 = 670
50 x 78 x 2= ( 50 x 2) x 78 = 100 x78 = 7800
25 x 67 x 4 = (25 x 4) x 67 = 100 x 67 = 6700
125 x 2 x 4 = ( 125 x 4 ) x 2 = 500 x 2 = 1000
67 x 5 x 2 = 67 x ( 5 x 2) = 67 x 10 = 670
50 x 78 x 2 = ( 50 x 2 ) x 78 = 100 x 78 = 7800
25x4x67=6700
125x2x4=1000
67x(5x2)=670
50x2x78=7800
Giải giúp mình bài toán này với ạ .
Thực hiện phép tính:
a) 2/67 - (3/7+2/67)
b) 3/4×5/2+5/4×5/2
\(\dfrac{2}{67}-\left(\dfrac{3}{7}+\dfrac{2}{67}\right)\\ =\dfrac{2}{67}-\dfrac{215}{469}\\ =\dfrac{-3}{7}\)
\(\dfrac{3}{4}.\dfrac{5}{2}+\dfrac{5}{4}.\dfrac{5}{2}\\ =\left(\dfrac{3}{4}+\dfrac{5}{4}\right).\dfrac{5}{2}\\ =2.\dfrac{5}{2}\\ =\dfrac{5}{1}\)
Biết rằng a150 chia cho 67 dư 4 ,a151chia cho 67 dư 61 . Hỏi a chia cho 67 dư bao nhiêu ?
tính 4-(12/67+13/41)-(-12/67+28/41)
mng lm nhanh hộ mik nha.Mik cảm ơn ạ
Bài 2. (1 điểm) Thực hiện phép tính:
a) $67. 36 + 67. 65 - 67$;
b) $(7^{23}. 45 + 7^{23}. 4) \, : \, 7^{25}$.
a)
=67.(36+65-1)
=67.100
=6700
b)
=[723.(45+4)]:725
=[723. 49 ]:725
=[723. 72 ]:725
=725 :725
=1
a) 67.36 + 67.65 - 67 = 67.\(\left(36+65-1\right)\) = 67. 100 = 6700
b) \(\left(7^{23}.45+7^{23}.4\right):7^{25}\) = \(7^{23}.\left(45+4\right):7^{25}=7^{23}.7^2:7^{25}=1\)
Tinh nhanh
a)(-4).(+125).(-25).(-6).(-8)
b)(-57).(67-34)-67.(34-57)
Ý là sao ???????????????????????????????????????????????????
a) (-4)(125)(-25)(-6)(-8)
=[(-4)(-25)].[125.(-8)].(-6)
= 100 . (-1000) . (-6)
= -100000.(-6)=600000
b)(-2)(-2)(-2)(-3)(-3)(-3)
= (-2)3.(-3)3
= [(-2)(-3)]3 = 63 = 216
a) (-4).125.(-25).(-6).(-8)
=[(-4).(-25)].[-8.125].-6
=100.-1000.-6
=600000
b)=63=216
tính nhanh
a, ( -4 ) . ( +3 ) . ( -125 ) . ( +25 ) . ( -8 )
b, ( -67 ) . ( 1 - 301 ) - 301 . 67
( -4 ) . 3 . ( -125 ) . 25 . ( -8 )
= [ -4 . 25 ] . [ -125 . ( -8 ) ] . 3
= -100 . 1000 . 3
= -100 000 . 3
= -300 000
( -67 ) . ( 1 - 301 ) - 301 . 67
= ( -67 ) . 1 - 301 - 301 . 67
= -67 . 1
= -67
a, ( -4 ) . ( +3 ) . ( -125 ) . ( +25 ) . ( -8 )
= ( - 4 ) . ( + 25 ) . ( - 125 ) . ( - 8 ) . ( + 3 )
= 100 . 1000 . 3
= 100000 . 3
= 300000
b, ( -67 ) . ( 1 - 301 ) - 301 . 67
= ( - 67 ) . 1 + 67 . 301 - 301 . 67
= -67 . 1
= - 67
a, ( -4 ) . ( +3 ) . ( -125 ) . ( +25 ) . ( -8 )
=>300000
b, ( -67 ) . ( 1 - 301 ) - 301 . 67
=>-67