Question

giúp

tính hợp lí

45-5.(12+9)=

Answer 1

\(45-5\cdot\left(12+9\right)=45-5\cdot12-5\cdot9=-5\cdot12=-60\)

Answer 2

45−5⋅(12+9)=45−5⋅12−5⋅9=−5⋅12=−60

Answer 3

45−5⋅(12+9)=45−5⋅12−5⋅9=−5⋅12=−60

Answer 4

\(45-5.(1+.9) \)

\(=45-5.12+9\)

\(=45-60-45\)

\(=-60\)

Answer 5

\(45-5\left(12+9\right)=45-5.12-5.9=-5.12=-60\)

Answer 6

45 − 5 ⋅ ( 12 + 9 ) = 45 − 5 ⋅ 12 − 5 ⋅ 9 = − 5 ⋅ 12 = − 6045 − 5 ⋅ ( 12 + 9 ) = 45 − 5 ⋅ 12 − 5 ⋅ 9 = − 5 ⋅ 12 = − 60