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\(a,-7624+\left(1543+7624\right)-x=25\)
\(\Leftrightarrow-7624+9167-x=25\)
\(\Leftrightarrow1543-x=25\)
\(\Leftrightarrow x=1518\)
Vậy ................
\(b,\left(27-514\right)-\left(486-73\right)+x=7\)
\(\Leftrightarrow-487-413+x=7\)
\(\Leftrightarrow-900+x=7\)
\(\Leftrightarrow x=907\)
\(c,14-12+x=10-\left|-15\right|+\left|-3\right|\)
\(\Leftrightarrow2+x=10-15+3\)
\(\Leftrightarrow2+x=-2\)
\(\Leftrightarrow x=-4\)
Vậy ....
a) - 7624 + (1543 + 7624) - x = 25
-7624 + 9167 - x = 25
1543 - x = 25
x = 1543 - 25
x = 1518
b) (27 - 514) - (486 - 73) + x = 7
(-487) - 413 + x = 7
-900 + x = 7
x = 7 - (-900)
x = 907
c) 14 - 12 + x = 10 - |-15| + |-3|
14 - 12 + x = 10 - 15 + 3
14 - 12 + x = (-5) + 3
14 - 12 + x = -2
2 + x = -2
x = (-2) - 2
x = -4
a)-7624+(1543+7624)=(-7624+7624)+1543=1543
b)(27-514)-(486-73)=27-514-486+73=(27+73)-(514-486)=100-28=72
\(a,-7624+\left(1543+7624\right)\)
\(=\left[\left(-7624\right)+7624\right]+1543\)
\(=0+1543=1543\)
\(b,\left(27-514\right)-\left(486-73\right)\)
\(=27-514-486+73\)
\(=\left(27+73\right)-\left(514+486\right)\)
\(=100-1000\)
\(=-900\)
Chúc bạn làm bài đạt điểm cao nhé !
a) \(-7624+\left(1543+7624\right)\)
\(=-7624+1543+7624\)
\(=\left(-7624+7624\right)+1543=0+1543=1543\)
b) \(\left(27-514\right)-\left(486-73\right)\)
\(27-514-486+73\)
\(=\left(27+73\right)-\left(514+486\right)=100-1000=-900\)
tk nmk nh. ~học tốt!
a) -7624 + ( 1543+7624 ) =1543
b) (27-514)- (486-73 ) = -900
Nếu đúng thì các bạn k cho mình nhé :):):):):):):):):)::)):):)::))):))):
a) -7624+(1543+7624)
= -7624+1543+7624
=(-7624+7624)+1543
= 0 +1543=1543
b) (27-514) - ( 486 - 73)
= ( 27 - 514 ) + ( -486 - 73 )
= 27 - 514 + 486 + 73
= 27 + 73 + 514 - 486
= 100 + 28=128
-7624 + ( 1543 + 7624 )
= -7624 + 1543 + 7624
= ( -7624 + 7624 ) + 1543
= 0 + 1543
= 1543
( 27 - 514 ) - ( 486 - 73 )
= 27 - 514 - 486 + 73
= ( 27 + 73 ) - ( 514 + 486 )
= 100 - 1000
= -900
-7624 + ( 1543 + 7624 )
= ( -7624 + 7624 ) + 1543
= 0 + 1543
= 1543
( 27 - 514 ) - ( 486 - 73 )
= ( -487 ) - 413
= -900
106.
\(9-25=\left(7-x\right)-\left(25+7\right)\)
\(-16=\left(7-x\right)-32\)
\(\left(7-x\right)-32=-16\)
\(7-x=-16+32\)
\(7-x=16\)
\(-x=16-7\)
\(-x=9\)
\(x=-9\)
\(\text{Vậy }x=-9\)
107. a) 2575 + 37 – 2576 – 29 = ( 2575 – 2576 ) + ( 37 – 29 ) = -1 + 8 = 7
b) 34 + 35 + 36 + 37 – 14 – 15 – 16 – 17
= ( 34 – 14 ) + ( 35 – 15 ) + ( 36 – 16 ) + ( 37 – 17 )
= 20 + 20 + 20 + 20 = 80
108.
a) – 7624 + ( 1543 + 7624 )
= -7624 + 1543 + 7624
= (-7624 + 7624)+1543
= 0 + 1543
= 1543
b) ( 27 – 514 ) – ( 486 – 73 )
= 27 - 514 - 486 + 73
= (27 + 73) - (514 + 486)
= 100 - 1000
= -900
108: Tính nhanh:
a)-7624+(1543+7624)
=-7624+1543+7624
=(-7624+7624)+1543
=0+1543=1543
b)(27-514)-(486-73)
=27-514-486+73
=(27+73)-(514+486)
=100-1000=-900
a) -7624+(1543+7624)
= -7624+1543+7624
=-7624+7624+1543
=0+1543
=1543
b) (25-514)-(486-73)
=25-514-486+73
=25+73-514-486
=100-1000
=-900
\(a,\)\(9-25=\left(7-x\right)-\left(25+7\right)\)
\(-16=\left(7-x\right)-32\)
\(7-x=-16+32\)
\(7-x=16\)
\(x=7-16=-9\)
\(b,-7624+\left(1543+7624\right)-x=25\)
\(-7624+9167-x=25\)
\(1543-x=25\)
\(x=1543-25\)
\(x=1518\)
\(c,\left(27-514\right)-\left(486-73\right)+x=7\)
\(-487-413+x=7\)
\(-900+x=7\)
\(x=7+900\)
\(x=907\)