Question

Thực hiện phép tính:

a) 5 . 4² – 18 : 3²;

b) 3³ . 18 – 3³ . 12;

c) 39 . 213 + 87 . 39;

d) 80 – [130 – (12 – 4)²].

Answer 1

a) 5 . 4² – 18 : 3² = 5 . 16 - 18 : 9 = 80 - 2 = 78;

b. 3³ . 18 – 3³ . 12 = 3³ (18 - 12) = 27 . 6 = 162;

c) 39 . 213 + 87 . 39 = 39 . (213 + 87) = 39 . 300 = 11700;

d) 80 – [130 – (12 – 4)²] = 80 - (130 - 8²)  = 80 - (130 - 64) = 80 - 66 = 14.

Answer 2

a,5*4^2-18:3^2

=5*16-18:9

=80-2

=78

b, 3^3*18-3^3*12

=27*18-27*12

=27(18-12)

=27*6

=162

c,39*213+87*39

=39(213+87)

=39*300

=11700

d,80-[130-(12-4)^2]

=80-(130-8^2)

=80-(130-64)

=80-66

=14

Answer 3

a)5.4²-18:3²

=5.16+18:9

=80+2

=82

b) 3³.18-3³.12

=3³.(18-12)

=3³.6

=9.6

=54

c) 39.213+87.39

=39.(213+87)

=39.300

=11700

d) 80-[130-(12-4)²]

=80-[130-8²]

=80-[130-64]

=80-66

=14

Answer 4

a) 5. 4² -18 : 3²

= 5. 16 - 18 : 9

= 80 - 2

= 78

b) 3³. 18 - 3³ .12

= 3³. (18 - 12)

= 3³ . 6

= 27 .6

= 162

c) 39 . 213 + 87 .39

= 39 . (213  + 87)

= 39 . 300

= 11700

d) 80 - [130 - (12 - 4)² ]

= 80 - [130 - 8² ]

= 80 - [130 - 64 ]

= 80 - 66

= 14