13 +25
13, 25 : 0,5 + 13, 25 : 0, 25 + 13, 25 : 0 , 125 = ?
13 , 25 : 0, 5 + 13 , 25 : 0 , 25 + 13 , 25 : 0 , 125
= 13 , 25 x 2 + 13 , 25 x 4 + 13 , 25 x 8
= 13 , 25 x ( 2 + 8 ) + 13 , 25 x 4
= 13 , 25 x 10 + 43
= 132 , 5 + 43
= 175 , 5
Tham khảo nha !!! Chúc học tốt ~!!
13 , 25 : 0, 5 + 13 , 25 : 0 , 25 + 13 , 25 : 0 , 125
= 13 , 25 x 2 + 13 , 25 x 4 + 13 , 25 x 8
= 13 , 25 x ( 2 + 8 ) + 13 , 25 x 4
= 13 , 25 x 10 + 43
= 132 , 5 + 43
= 175 , 5
Viết tiếp vào chổ trống:
N h ậ n x é t : 2 3 × 4 5 = . . . , 4 3 × 2 3 = . . . . V ậ y 2 3 × 4 5 . . . . . . 4 5 × 2 3 N h ậ n x é t : ( 1 3 × 2 5 ) × 3 4 = . . . . 1 3 × ( 2 5 × 3 4 ) = . . . . ( 1 3 × 2 5 ) × 3 4 . . . . 1 3 × ( 2 5 × 3 4 ) N h ậ n x é t : ( 1 5 × 2 5 ) × 3 4 = . . . . 1 5 × 3 4 + 2 5 × 3 4 = . . . . V ậ y 1 5 + 2 5 × 3 4 . . . 1 5 × 3 4 + 2 5 × 3 4
-7/25 × 11/13 + -7/25 × 2/13 - 18/25
= -7/25 x ( 11/13 + 2/13 ) - 18/25
= - 7/25 x 1 - 18/25
= -7/25 - 18/25
= -1
nhớ tích cho mình nha mình cảm ơn rất nhìu^^
-7/25 * 11/13 + -7/25 * 2/13 - 18/25
\(=\dfrac{-7}{25}\left(\dfrac{11}{13}+\dfrac{2}{13}\right)-\dfrac{18}{25}=-1\)
-7/25 . 11/13 + 2/13 . -7/25 - 18/25
( -7/25 + -7/25 ) . ( 11/13 + 2/13 ) - 18/25
-14/25 . 1 - 18/25
= -32/25
-23 / 25 . 10 / 13 + -23 / 25 . 3 / 13 + -27 / 25
\(\frac{-23}{25}.\frac{10}{13}+\frac{-23}{25}.\frac{3}{13}+\frac{-27}{25}\)
= \(\frac{-23}{25}.\left(\frac{10}{13}+\frac{3}{13}\right)+\frac{-27}{25}\)
= \(\frac{-23}{25}.1+\frac{-27}{25}\)
= \(\frac{-23}{25}+\frac{-27}{25}\)
= \(\frac{-50}{25}\)
= \(-2\)
\(\frac{-23}{25}.\frac{10}{13}+\frac{-23}{25}.\frac{3}{13}+\frac{-27}{25}\)
\(=\frac{-23}{25}\left(\frac{10}{13}+\frac{3}{13}\right)+\frac{-27}{25}\)
\(=\frac{-23}{25}+\frac{-27}{25}=\frac{-50}{25}=-2\)
-23/25.10/13+-23/25.3/13+-27/25
= -23/25(10/13+3/13)+-27/25
= -23/25.1+-27/25
= -23/25+-27/25
= -2
-7/25 . 11/13 + -7/25. 2/13 - 18/25
=7/25.(11/13+2/13)- 18/25
=7/25.1-18/25
=7/25-18/25
=-11/25
\(=-\frac{7}{25}.\left(\frac{11}{13}+\frac{2}{13}\right)-\frac{18}{25}\)
\(=-\frac{7}{25}.1-\frac{18}{25}\)
\(=-\frac{7}{25}-\frac{18}{25}\)
\(=1\)
-13/19.8/25+13/19.-17/25
= 13/19 . (-8/25 - 17/25)
= 13/19 . (-25)/25
= 13.19 . (-1)
= -13/19
\(\dfrac{-13}{19}.\dfrac{8}{25}+\dfrac{13}{19}.\dfrac{-17}{25}\)
= \(\left(\dfrac{-13}{19}+\dfrac{13}{19}\right)x\left(\dfrac{8}{25}-\dfrac{-17}{25}\right)\)
=\(0.1=0\)
thực hiện phép tính :
a, -7/25 . 11/13 + -7/25 . 2/13 - 18/25
\(a)-7/25*(11/13+2/13)-18/25=-7/25*1-18/25=-7/25-18/25=-25/25=-1\)
\(=-\dfrac{7}{25}\left(\dfrac{11}{13}+\dfrac{2}{13}\right)-\dfrac{18}{25}=-\dfrac{7}{25}.1-\dfrac{18}{25}=-\dfrac{25}{25}=-1\)
\(\dfrac{-7}{25}.\dfrac{11}{13}+\dfrac{-7}{25}.\dfrac{2}{13}-\dfrac{18}{25}\\ =\dfrac{-7}{25}\left(\dfrac{11}{13}+\dfrac{2}{13}\right)-\dfrac{18}{25}\\ =\dfrac{-7}{25}.\dfrac{13}{13}-\dfrac{18}{25}\\ =\dfrac{-7}{25}.1-\dfrac{18}{25}\\ =\dfrac{-7}{25}-\dfrac{18}{25}\\ =\dfrac{-25}{25}\\ =-1\)
(-7 + |13|)-(13-|-7|-25)-(25+|-10|-9)
Lời giải:
$=(-7+|13|)-(13-|-7|-25)-(25+|-10|-9)$
$=(-7+13)-(13-7-25)-(25+10-9)$
$=-7+13-13+7+25-25-10+9$
$=(-7+7)+(13-13)+(25-25)-10+9=-10+9=-1$