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mk chỉ km dc câu đầu thoiii,SORRY
18.37+18.64-18
=18.37+18.64-18.1
=18.(37+64-1)
=18.100=1800
hc tốt#
a)18.37+18.64-18
=18.(37+64-1)
=18.100
=1800
b)175-[(32-23).5-15]:3
=175-(9.5-15):3
=175-30:3
=175-10
=165
nhớ k cho mk nha
a) \(\frac{9}{18}--\frac{7}{12}+\frac{13}{32}=\frac{9}{18}+\frac{7}{12}+\frac{13}{32}=\frac{144}{288}+\frac{168}{288}+\frac{117}{288}=\frac{143}{76}\)
b) \(\frac{5}{-8}\times\frac{14}{23}-\frac{6}{10}=\frac{-35}{92}-\frac{6}{10}=\frac{-175}{460}-\frac{276}{460}=\frac{-451}{460}\)
k đúng cho mình nha
\(a,\Rightarrow x+35=103\\ \Rightarrow x=68\\ b,\Rightarrow x+7=42\\ \Rightarrow x=35\\ c,\Rightarrow x-15=9\\ \Rightarrow x=24\\ d,\Rightarrow x+23=31\\ \Rightarrow x=8\\ e,\Rightarrow18-x=6\\ \Rightarrow x=12\\ f,\Rightarrow x+14=34\\ \Rightarrow x=20\\ g,\Rightarrow2x+1=21\\ \Rightarrow x=11\\ h,\Rightarrow3\left(x+1\right)=99\\ \Rightarrow x+1=33\Rightarrow x=32\\ i,5\left(x-3\right)=25\\ \Rightarrow x-3=5\\ \Rightarrow x=8\\ j,\Rightarrow8\left(2x+7\right)=88\\ \Rightarrow2x+7=11\Rightarrow x=2\\ k,\Rightarrow5\left(x+4\right)=85\\ \Rightarrow x+4=17\\ \Rightarrow x=13\)
15) $|-18| + (-12)=18-12=6$
16) $17+ |-33|=17+33=50$
17) $(– 20) + |-88|=-20+88=68$
18) $|-3| + |5|=3+5=8$
19) $|-37| + |15|=37+15=52$
20) $|-37| + (-|15|)=37-15=22$
21) $(-|-32|) + |5| 22)(-|-22|)+ (-|16|)=-32+5.22-22=-32+4.22=-32+88=56$
23) $(-23) + 13 + ( - 17) + 57=-23+13-17=-40+13=-23$
24) $14 + 6 + (-9) + (-14)=14+6-9-14=6-9=-3$
25) $(-123) +|-13|+ (-7)=-123+13-7=-110-7=-117$
26) $|0|+|45|+(-|-455)|+|-796|=0+45-455+796=-410+796=386$
\(98.42-50\left[\left(18-2^3\right):2+3^2\right]\\ =4116-50\left[\left(18-8\right):2+9\right]\\ =4116-50\left[10:2+9\right]\\ =4116-50\left[5+9\right]\\ =4116-50.14\\ =4116-700\\ =3416\)
98.42-50.[(18-23):2 +32]
=98.42-50.[(18-8):2+32]
=98.42-50.[10:2+3]
=98.42-50.[5+3]
=98.42-50.8
= 4116-400
=3716
A. -14 - 7 - 12 - 24
= - 21 - 12 - 24
= - 33 - 24
= - 57
B. -10 - 14 - 16 + 43
= - 24 - 16 + 43
= - 40 + 43
= - 83
C. 32 + |-23| - 57 - (-23)
= 32 + 23 - 57 +23
= 55 - 57 + 23
= - 2 + 23
= 21
D. |-8| + |-4| - (-12) + 5
= 8 + 4 + 12 + 5
= 12 + 12 + 5
= 24 + 5
= 29
E. |-13| - |-17| + (-20) - (-18)
= 13 - 17 - 20 + 18
= - 4 - 17 - 20 + 18
= - 21 - 20 + 18
= - 41 + 18
= 23
A. -14-7-12-24=-21-36=-57
B. -10-14-16+43=-24+27=3
C.32+\(^{|-23|}\)-57-(-23)=32+23-57+23=55-80=-25
D.\(|-8|+|-4|\)-(-12)+5=8+4+12+5=12+17=29
E.\(|-13|-|-17|\)+(-20)-(-18)=13-17-20+18=-4-2=-6
- 16 + 45 - 37 - 23 - 32
= 29 - 37 - ( - 9 )
= ( - 8 ) - ( - 9 )
= 1
Phần kia bạn tự làm nhé
- 16 + 45 - 37 - 23 + 32 = 1
56 + 35 + 23 + 34 - 18 = 130
mik nha
tks bn nhiều
\(5\times2^3-18:3^2\\ =5\times8-18:9\\ =40-2\\ =38\)
5 . 23 - 18 : 32
= 5 . 8 - 18 : 9
= 40 - 2
= 38