Tính hợp lý
-1945-(567-1945)=
184.33+67.184=
44.(-36)+22.(-28)=
2155-(174+2155)+(-68+174)=
-25.72+25.21-49.25=
35(14-23)-23(14-35)=
Tính hợp lý
-1945-(567-1945)=
184.33+67.184=
44.(-36)+22.(-28)=
2155-(174+2155)+(-68+174)=
-25.72+25.21-49.25=
35(14-23)-23(14-35)=
$1)$ -1945 -(567-1945)
$= -1945 – 567 + 1945$
$= ( -1945 + 1945 ) – 567$
$= 0 – 567$
$= – 567$
$2) 184.33+67.184$
$= 184. ( 33 + 67)$
$= 184 . 100$
$= 18400$
$3) 44.(-36)+22.(-28)$
$= $22.2.(-36)+22.(-28)
$=22[2.(-36)+(-28)]$
$=22.(-100)$
$=-2200$
$4) 2155-(174+2155)+(-68+174)$
$= 2155 – 174 – 2155 – 68 + 174$
$= ( 2155 – 2155 ) + [ ( – 174 ) + 174 ] – 68$
$= 0 + 0 + ( -68 )$
$= – 68$
$5)$ -25 .72 $+$ 25 . 21 $-$ 49 . 25
$ = 25 . ( -72 ) + 25 . 21 – 49 . 25$
$= 25 . ( -72 + 21 – 49 ) $
$= 25 . ( – 100 )$
$= – 2500$
$6) 35(14-23)-23(14-35)$
$= 35 . 14 – 35 . 23 – 23 . 14 + 23 . 35$
$= ( 35.14 – 23.14) + ( 23 . 35 – 35.23)$
$= 14 . ( 35 – 23 ) + 0$
$= 14 . 12 + 0$
$= 168 + 0$
$= 168$
$@YuuSaji$
Đáp án:
@fish
-1945-(567-1945)= -567
184.33+67.184= 6072+ 12328=18400
44.(-36)+22.(-28)= -1584 + -616=-2200
2155-(174+2155)+(-68+174)= 2155- 2329+106 =174+106=-68
-25.72+25.21-49.25=-1800+525-1225=2325-1225=1100
35(14-23)-23(14-35)=35.-9-23.-21= -315 -(-483)=168
#hoctot
no copy
xin hay nhât a
Giải thích các bước giải: