Question

Tính sau khi bỏ ngoặc

(13+49)-(13-135+49)

(18+29)+(158-18-29)

4.5²-3.(24-9)

[93-(20-7)]:16

Answer 1

(13+49)-(13-135+49)
= 13 + 49 - 13 +135 - 49
=135
(18+29)+(158-18-29)
=18+29+158-18-29
=158
4.5²-3.(24-9)
= 4.25-3.24-9
=19
[93-(20-7)]:16
=93-20+7:16
=73,4375

Answer 2

\(\left(13+49\right)-\left(13-135+49\right)\)

\(=13+49-13+135-49\)

\(=135\)

\(\left(18+29\right)+\left(158-18-29\right)\)

\(=18+29+158-18-29\)

\(=158\)

\(4.5^2-3.\left(24-9\right)\)

\(=4.25-3.24+3.9\)

\(=100-72+27\)

\(=28+27\)

\(=55\)

\(\left\{93-\left(20-7\right)\right\}:16\)

\(=\left(93-20+7\right):16\)

\(=\left(73+7\right):16\)

\(=80:16\)

\(=5\)

Answer 3

(13+49)-(13-135+19)

=13+49-13-135+19

=13-13+49-19+135

=0+30+135

=165

(18+29)+(158-18-29)

=18+29+158-18-29

=18-18+29-29+158

=0+0+158

=158

4.5²-3.(24-9)

=4.5²-3.24-9

=4.25-3.24-9

=100-72-9

=19

[93-(20-7)]:16

=93-20-7:16

=93-20-0.4375

=72,5625

Answer 4

 a) (13+49)-(13-135+49)

=13+49-13+135-49

=135.

b) (18+29)+(158-18-29)

=18+29+158-18-29

=158.

c) 4.5²-3.(24-9)

=4.25-3.15

=100-45

=55.

d) [93-(20-7)]:16

=[93-13]:16

=80:16

=5.