Question

[Trần Bảo Ngọc]

a) 23 – 53 : 52 + 12.22	b) 5[(85 – 35 : 7) : 8 + 90] – 50
c) 2.[(7 – 33 : 32) : 22 + 99] – 100	d) 27 : 22 + 54 : 53 . 24 – 3.25
e) (35 . 37) : 310 + 5.24 – 73 : 7	f) 32.[(52 – 3) : 11] – 24 + 2.103

Answer 1

[Võ Ngọc Phương]

a) \(2^3-5^3:5^2+12.2^2\)

\(=8-5+12.4\)

\(=8-5+48\)

\(=3+48\)

\(=51\)

b) \(5\left[\left(85-35:7\right):8+90\right]-50\)

\(=5\left[\left(85-5\right):8+90\right]-50\)

\(=5\left[80:8+90\right]-50\)

\(=5\left[10+90\right]-50\)

\(=5.100-50\)

\(=500-50\)

\(=450\)

c) \(2.\left[\left(7-3^3:3^2\right):2^2+99\right]-100\)

\(=2.\left[\left(7-3\right):4+99\right]-100\)

\(=2.\left[4:4+99\right]-100\)

\(=2.\left[1+99\right]-100\)

\(=2.100-100\)

\(=200-100\)

\(=100\)

d) \(2^7:2^2+5^4:5^3.2^4-3.2^5\)

\(=2^5+5.2^4-3.2^5\)

\(=32+5.16-3.32\)

\(=32+80-96\)

\(=112-96\)

\(=16\)

e) \(\left(3^5.3^7\right):3^{10}+5.2^4-7^3:7\)

\(=3^{12}:3^{10}+5.16-7^2\)

\(=3^2+80-49\)

\(=9+80-49\)

\(=89-49\)

\(=40\)

f) \(3^2.\left[\left(5^2-3\right):11\right]-2^4+2.10^3\)

\(=9.\left[\left(25-3\right):11\right]-16+2.1000\)

\(=9.\left[22:11\right]-16+2.1000\)

\(=9.2-16+2.1000\)

\(=18-16+2000\)

\(=2+2000\)

\(=2002\)

\(#WendyDang\)