Question

a,3.52+(15.22-23.22)

b,75.34+76.75-75.10

c,84:4+3 mũ 9 : 3 mũ 7 +2017 mũ 0

Answer 1

a,3.52+(15.22-23.22)

= 156 + 22(15 - 23)

= 156 + 22. (-8)

= 156 - 176

= -20

b,75.34+76.75-75.10

= 75(34 + 76 - 10)

= 75. 100

= 7500

c,84:4+3 mũ 9 : 3 mũ 7 +2017 mũ 0

= 84 : 4 + 3⁹ : 3⁷ + 2017⁰

= 21 + 9 + 1

= 31

Answer 2

a) Ta có: \(3\cdot52+\left(15\cdot22-23\cdot22\right)\)

\(=3\cdot52+22\cdot\left(15-23\right)\)

\(=3\cdot52+22\cdot\left(-8\right)\)

\(=156-176=-20\)

b) Ta có: \(75\cdot34+76\cdot75-75\cdot10\)

\(=75\cdot\left(34+76-10\right)\)

\(=75\cdot\left(110-10\right)\)

\(=75\cdot100\)

\(=7500\)

c) Ta có: \(84:4+3^9:3^7+2017^0\)

\(=21+3^{9-7}+1\)

\(=22+3^2\)

\(=22+9=31\)