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5.42 - 18 : 32 . 22+2.115 = 5 .24 - 2.32:32.22+2
= 5 . 24 - 23 + 2
= 5 . 10 = 50
80- (4.52-3.23) = 24 . 5 - 22 .52 + 3 .23
= 22 ( 22 .5-5+ 3.2)
= 4 . 21 = 84
1) 22.25.17.+5.20.27+102.56
=4.25.17+5.20.27+100.56
=100.17+100.27+100.56
=100(17+27+56)
=100.100
=10000
2) 132-[116-(132-1282)]
=132-[116-(132-16384)]
=132-[116-(-16252)]
=132-(116+16252)
=132-16368
=-16236
3) 4.52-81:32
=4.25-34:32
=100-34-2
=100-32
=100-9
=91
a) (5^2+1)-9.3= 26-27=-1
b) 80 - (4.5^2-3.2^3)=80-(100-24)=4
c) [(-18)+(-7)]-15=-25-15=-40
d) (-219)-(-229)+12.5=10+12.5=22.5
a) \(\left[\left(10-2.30.5\right)+2.6\right]:2+\left(4.5\right)^2\)
\(=\left[\left(10-300\right)+2.6\right]:2+20^2\)
\(=\left(-290+2.6\right):2+400\)
\(=\left(-290+12\right):2+400\)
\(=-278:2+400\)
\(=-139+400\)
\(=-\left(139-400\right)\)
\(=-\left(-261\right)\)
\(=261\)
b) \(536.27-9\left(825+219\right):18+15^3:15^2.4^2.3\)
\(=536.27-9.1044:18+15^3:15^2.4^2.3\)
\(=14472-9396:18+15^3:15^2.4^2.3\)
\(=14472-522+15^3:15^2.4^2.3\)
\(=13920+15^{3-2}.4^2.3\)
\(=13920+15.4^2.3\)
\(=13920+15.16.3\)
\(=13920+240.3\)
\(=13920+720\)
\(=14640\)
a) = (25+1)-27
= 26-27
= -1
b) = 80 - ( 4.25 - 3. 8)
= 80 - (100-24)
= 80 - 76
= 4
c)= - 25 -15
= -25+ (-15)
= -40
d) =(-219) + ( -219) +30
= -438 +30
= -408
bai 2 : x E { -3;-2;-1;0;1;2;3;4}
tong la:
= -3+(-2)+(-1)+0+1+2+3+4
= (-3 +3)+(-2+2)+(-1+1)+0+4
= 0+0+0+0+4
=4
tick nha
a) (52 + 1) - 9.3 b) 80 - (4.52 - 3. 23) c) [(-18) + (-7)] - 15 d) (-219) - (219) + 12.5
=(25-1)-27 = 80-(4.25 -3 . 8) =(-25) -15 =0+12.5
=24-27 =80-(100-24) =(-25)+(-15) =12.5
=24+(-27) =80-76 =-40 =60
=-3 4
Bài 2: Liệt kê và tính tổng tất caar các số nguyên x thỏa mãn: -4 < x < 5
X THUỘC {-3;(-2);(-1);0;1;2;3;4}
tổng là :
-3+(-2)+(-1)+0+1+2+3+4
=[-3+3]+[-2+2]+[-1+1]+0+4
=0+0+0+0+4
=0+4
=4
\(a,245-96+6\)
\(=155\)
\(b,=23\times\left(65+35\right)\)- 360
\(=23\times100-360\)
\(=1940\)
\(c,3^3+3^2-\left(2^2+7\right)\)
\(3^3+3^2-\left(4+7\right)\)
=\(3^3+3^2-11\)
=\(27+9-11\)
a) \(4.5^2-81:3^2=4.25-81:9=100-9=91\)
b) \(3^3.23-3^3.19=3^3.\left(23-19\right)=27.4=108\)
c) \(2^4.5-[131-\left(13-4\right)^2]=16.5-\left(131-9^2\right)=80-\left(131-81\right)=80-50=30\)
d) \(100:\left\{250:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\)
\(=100:\left\{250:\left[450-4.\left(125-25\right)\right]\right\}\)
\(=100:\left[250:\left(450-4.100\right)\right]\)
\(=100:\left[250:\left(450-400\right)\right]=100:\left(250:50\right)=100:5=20\)
4. 52 - 18 : 32
= 4 . 25 - 18 : 9
= 100 - 2
= 98
= 98