Question

Tính bằng thuận tiện nhất:

A.12,4*72,53+27,47*12,4

B.32,42+10,49+17,58

Answer 1

\(\text{#}HaimeeOkk\)

A) \(12,4×(72,53+27,47)\)

\(=12,4×100\)

\(=1240\)

\(B)(32,42+17,58)+10,49\)

\(=50+10,49 \)

\(=60,49\)

Answer 2

A. 12,4 . 72,53 + 27,47 . 12,4

= 12,4 (72,53 + 27,47)

= 12,4 . 100

= 1240

B. 32,42 + 10,49 + 17,58

= ( 32,42+17,58 ) + 10,49

= 50 + 10,49

=  60,49

_HT_