2*[74-(25-17)*3]+x=158
2.[74-(25-17).3+x=158 tìm x~
câu hỏi : 2.[ 74 - ( 25 -17 ).x 3 ] + x = 158
2 [74 - 8 x 3] + x =158
2. (74 - 8 )x 3 + x=158
2 . 66 x3 + x = 158
132 x3 + x =158
3x + 132x =158
135x =158
x=158 : 135
x=1,17
Vậy x=1,17
~Chúc bạn học giỏi~
17464 - 17464 : 74 - 74 X 158 = ?
17464 - 17464 : 74 - 74 X 158 = ?
tính bằng cách thuận tiện nhất
a)152,693*560+1526,93*35+15,2693*1900
b)12.6*25+612*2,5+26,2:0,04
c)74*158+69/158*75-89
giúp mình nha nhanh mk tick liền!
\(a)152,693\cdot560+1526,93\cdot35+15,2693\cdot1900=1526,93\cdot56+1526,93\cdot35+1526,93\cdot19\)
\(=1526,93\cdot\left(56+35+19\right)\)
\(=1526,93\cdot110\) \(\)
\(=1526,93\cdot100+1526,93\cdot10\)
\(=152693+15269,3\)
\(=167962,3\)
\(b)12,6\cdot25+612\cdot2,5+26,2:0,04=126\cdot2,5+612\cdot2,5+262\cdot2,5\)
\(=2,5\cdot\left(126+612+262\right)\)
\(=2,5\cdot1000\)
\(=2500\)
Tai vi minh kohieu ban viet gi
Tìm giá trị biểu thức:
17464 - 17464 : 74 - 74 x 158 32047 - 17835 : 87 x 98 - 98
( 34044 - 324 x 67 ) : 48 - 48 16796 - ( 167960 : 68 -68 x 34 )
GIÚP MÌNH !!!
a: \(17464-17464:74-74\cdot158\)
\(=17464\cdot\left(1-\dfrac{1}{74}\right)-74\cdot158\)
\(=17464\cdot\dfrac{73}{74}-74\cdot158\)
\(=5536\)
5536 nhé bạn
thấy đúng thì tim nhé
Bài 2: Tính hợp lí
1) 125.(-24) + 24.225
2) 512.(2 – 128) – 128. (-512)
3) (187 -23) – (20 – 180)
4) (-37 – 17). (-9) + 35. (-9 – 11)
5) (-50 +19 +143) – (-79 + 25 + 48)
6) (-8).25.(-2). 4. (-5).125
7) 3784 + 23 – 3785 – 15
8) 215 +(-38) – (-58) –15
9) 5.(-3)2 –14.(-8)+(-40)
10) 215 + (-38) – (- 58) + 90 – 852)
Bài 3*: Tìm các cặp số nguyên (x;y) thỏa mãn xy2 + 2x – y2 =
1) 125.(-24) + 24.225.
\(=24\left(-125+225\right)=24.100=2400.\)
2) 512.(2 – 128) – 128. (-512).
\(=512\left(2-128+128\right)=512.2=1024.\)
(74*158+69)/(158*75-89)
( 74 x 158 + 59 ) : ( 158 x 75 - 89 )
= ( 11692 + 59 ) : ( 11840 - 89 )
= 11751 : 11751
= 1
Bài 1Tinh1 hợp lí
1) 2575 + 37 - 2576 -29
2) 35 + 35 + 36 +37 - 14 -15 -16 -17
3) 13. (-12) +87 .(-12)
4) 26 .17+17 .74
5) 25 . (-18) + 25 (- 82)
6) 25+37- 48 - 25 - 37
7) (-16) + 24 + 16 - 34
\(2575+37-2576-29\)
\(=2612-2576-29\)
\(=36-29=7\)'
\(35+35+36+37-14-15-16-17\)
\(=70+\left(36-16\right)+\left(37-17\right)-14-15\)
\(=70+20+20-14-15\)
\(=90+6-15\)
\(=96-15=81\)
\(13\cdot\left(-12\right)+87.\left(-12\right)\)
\(=\left(-12\right)\cdot\left(13+87\right)\)
\(=\left(-12\right)\cdot100=-1200\)
\(26\cdot17+17\cdot74\)
\(=\left(26+74\right)\cdot17\)
\(=100\cdot17=1700\)
\(25\cdot\left(-18\right)+25\left(-82\right)\)
\(=25\cdot\left[\left(-18\right)+\left(-82\right)\right]\)
\(=25\cdot\left(-100\right)=\left(-2500\right)\)
\(25+37-48-25-37\)
\(=\left(25-25\right)+\left(37-37\right)-48\)
\(=0+0-48\)
\(=0-48=\left(-48\right)\)
\(\left(-16\right)+24+16-34\)
\(=\left[\left(-16\right)+16\right]+\left(24-34\right)\)
\(=0+\left(-10\right)=\left(-10\right)\)