5.4^2 -18:3^2
=5.16 -18:9
=80-2
=78
3^3.18-3^3.12
=27.18-27.12
=27.(18-12)
=27.6
=162
39.213+87.39
=39.(213+87)
=39.300
=11700
80-[130-(12-4^2)]
=80-[130-(12-16)]
=80-[130-(-4)]
=80-134
=-54
thuc hien phep tinh:
a, 5+(-2)+(18-23)+2
b, |-6|:(-3)-43+(-2)².11
thuc hien phep tinh a)6^2:4 x 3+2x5^2 b)5x4^2 -18:3^2
thuc hien phep tinh:
a, -23+13-(-7)
b, 3.(-4)²:(-12)+[-45-(-34+31)³]
c, |-40|:8+4.(-2)-|+7|
1..thuc hien phep tinh
a) [18-(-21)+(-9)]-13
b)125-139+200-(-75)
c) (-33)-(-12)-4
d) 22+(-31)-32+50
1..tinh nhanh
22-(-23)-23.78
b) -83.36+17.(-36)
c) 30.(18-39)-39.(30-18)
2...thuc hien phep tinh
a) [18-(-21)+(-9)]-13
b)125-139+200-(-75)
c) (-33)-(-12)-4
d) 22+(-31)-32+50
giup mk xiu nha mk tick cho
Bai 1 Tim x biet
a)162+(15-x0=125
b)x^3*x^2=2^7/4
c)5(x+27)=200
d)x-3=6-(19-23)
e)(x+32)-145=92
f) 2*3^x=162
g)9x-9=3^2/3
h)162-(15+x)=148
Bai 2 Thuc hien phep tinh
a)12+14+16+18+...+86+88
b)217+[43+(-217)+(-23)]
c) (-345)+[(-724)+345+224]
d)2^3*3-(12-36)
1/4 - 1/3+ 5/12 Thuc hien cac phep tinh (tinh hop li neu co the)
1:" thuc hien phep tinh : (-1)+2-3+4-....-99+100
5 . (262 . 3^2) . (2^2)^6 - 2 . (2^2 . 3)^14 . 3^4
5.2^28 . 3^18 - 7 . 2^29 . 3^18
Thuc hien phep tinh tren!
Mau mau kiem tick nao!!!!
^.^ !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!