Tính nhanh
35*18-9*70+135
35 x 18 - 9 x 70 + 135
= 630- 630 + 135
= 0 + 135
= 135
Tính nhanh : 9 x 70 - 35 x 18 + 2020
\(=9\times\left(70-70\right)+2020\)
\(=0+2020=2020\)
\(=9\times70-35\times2\times9+2020\)
\(=9\times\left(70-70\right)+2020=0+2020=2020\)
Tính nhanh: 35 x 18 - 9 x 70 + 100
35 x 18 - 9 x 70 + 100
= 70 x 9 - 9 x 70 + 100
= 0 + 100
= 100
35 x 18 - 9 x 70 + 100
= 35 x 2 x 9 - 9 x 70 + 100
= 70 x 9 - 9 x 70 + 100
= (70 - 70) x 9 + 100
= 0 x 9 + 100
= 100
tính nhanh:
35 x 18 - 9 x 70 + 100
35 x 18 - 9 x 70 + 100
= 35 x 2 x 9 - 9 x 70 + 100
= 70 x 9 - 9 x 70 + 100
= 0 + 100
= 100
Tính nhanh :
35 × 18 - 9 × 70 + 100
= 35 × ( 2 × 9 ) - 9 × 70 + 100
= 35 × 2 × 9 - 9 × 70 + 100
= ( 35 × 2 ) × 9 - 9 × 70 + 100
= 70 × 9 - 9 × 70 + 100
= 9 × ( 70 - 70 ) + 100
= 9 × 0 + 100
= 0 + 100
= 100
35 X 18 - 9 X 70 + 100
= 35 X 2 X 9 - 9 X 70 + 100
= 70 X 9 - 9 X 70 + 100
= 70 X (9 - 9) + 100
= 70 X 0 + 100
= 0 + 100
= 100
Tk cho mình nha ae!!!!!!!!!!!!! Ai tk mình thì mình tk lại.
tính nhanh:
( 35 *18 -9*70) * 2010 * 2011 *2012 * ...............* 2020
( 35 x 18 - 9 x 70 ) x 2010 x 2011 x 2012 x ... x 2020
= 0 x 2010 x 2011 x 2012 x ... x 2020
= 0 nha !
(35*18-9*70)*2010*2011*.....*2020
=(630-630)*2010*........*2020
=0*2010*.........*2020
=0
CHÚC BẠN HỌC TỐT!
Tính nhanh
{ 35 x 18 - 9 x 70 } x 2010 x 2011 x ... x 2020
( 35 x 18 - 9 x 70 ) x 2010 x 2011 x ... x 2020
= (35 x 18 - 9 x 35 x 2) x 2010 x 2011 x ... x 2020
= ( 35 x 18 - 18 x 35 ) x 2010 x 2011 x ... x 2020
= 35 x (18 - 18 ) x 2010 x 2011 x ... x 2020
= 35 x 0 x 2010 x 2011 x ... x 2020
= 0 x 2010 x 2011 x ... x 2020
= 0
( 35 x 18 - 9 x 70 ) x 2010 x 2011 x . . . 2020
= 0 x 2010 x 2011 x . . . 2020
= 0
Chúc bạn học tốt ! ! !
Tính nhanh
( 35 x 18 - 9 x 70 ) x 2010 x 1011 x ... x 2020
giúp mk nha
tính nhanh: 135*57+135*86-35*143
91*47+49*53-18*47+24*53
giúp mik :v
135*57+135*86-35*143= 135 (57+86)-35*143=135*143-35*143=143 (135-35)=143*100=14300
91*47+49*53-18*47+24*53=(91*47-18*47)+(49*53+24*53)=47*(91-18)+53*(49+24)=47*73+53*73=73*(47+53)=73*100=7300
a,
\(135\cdot57+135\cdot86-35\cdot143\)
\(=135\cdot\left(57+86\right)-35\cdot143\)
\(=135\cdot143-35\cdot143\)
\(=143\cdot\left(135-35\right)\)
\(=135\cdot100\)
\(=13500\)
b,
\(91\cdot47+49\cdot53-18\cdot47+24\cdot53\)
\(=91\cdot47-18\cdot47+49\cdot53+24\cdot53\)
\(=47\cdot\left(91-18\right)+53\cdot\left(49+24\right)\)
\(=47\cdot73+53\cdot73\)
\(=73\cdot\left(47+53\right)\)
\(=73\cdot100\)
\(=7300\)
Tính bằng cách thuận tiện nhất : 9 x 70 - 35 x 18 + 2020