\(27\cdot39+27\cdot63-2\cdot27\)
\(=27\cdot\left(39+63-2\right)\)
\(=27\cdot100\)
\(=2700\)
27.39+27.63-2.27
=27.(39+63-2)
=27.100
=2700
tính nhanh 27.39+27.63-2.27
27.39+27.63-2.27
mình ko biết làm từ đâu mong mọi người giúp
tính nhanh các phép tinh:
A=8.17.125
b=4.37.25
c= 58.75+58.50-5825
d=27.39+27.63-2.27
TÍNH NHANH
a) 58.75+58.50-58.25
b)27.39+27.63-2.27
c)128.46+128.32+128.22
Bài tập:Tính nhanh:
a 27.39+27.63-2.27
b 66.25+5.66+66.14+33.66
c 136.23+136.17-40.36
d 48.19+48.115+134.52
A) 58.75+58.50-58.25
B) 27.39+27.63-2.27
C) 128.46+128.32+128.22
D) 12.35+35.182-35.94
E) 48.19+48.115+134.52
F) 136.23+136.17-40.36
G) 17.93+116.83+17.23
H) 19.27+47.81+19.20
I) 87.23+13.93+70.87
Tính nhanh:
A) 58.75+58.50-58.25
B) 27.39+27.63-2.27
C) 128.46+128.32+128.22
D) 12.35+35.182-35.94
E) 48.19+48.115+134.52
F) 136.23+136.17-40.36
G) 17.93+116.83+17.23
H) 19.27+47.81+19.20
I) 87.23+13.93+70.87
Tính nhanh 1
125.98-25.46.5
136.23+136.17-40.36
27.39+27.63-2.27
Bài 1:Tìm x
a,(3.x-2^4).7^3=2.7^4
b,x-[ 42+(-28)] = -8
c,4-(7.x)=x-(13-4)
Bài 2:Tính nhanh
a,58.75+58.50-58.25
b,27.39+27.63-2.27
c,48.13+48.115+134.52
d,27.121-87.27+73.34