80 – [130 – (12 - 4)2] = 80 – [130 – 82]

= 80 – [130 - 64] = 80 - 66 = 14

\(\text{80-[130-(12-4)^2]}=14\)

\(80-\left[130-\left(12-4\right)^2\right]=80-\left[130-8^2\right]=80-\left[130-64\right]=80-66=14\)

\(80-\left[130-\left(12-4\right)^2\right]\)

\(=80-\left[130-8^2\right]\)

\(=80-\left[130-64\right]\)

\(=80-66\)

\(=14\)

a) \(17+188+183=205+183=388\)

b) \(80-\left[130-\left(12-4\right)^2\right]\)

\(=80-\left(130-64\right)\)

\(80-66=14\)

c) \(2^3.17-2^3.14\)

\(8.17-8.14\)

\(=8.\left(17-14\right)\)

\(=8.3=24\)

a) 36:32+23.22=9/8+506=(9+506.8)/8=(9+4048)/8=4057/8

b) 3.52-16:22=156-8/11=(156.11-8)/11=(1716-8)/11=1708/11

c) 80-[130-(12-4)2]=80-[130-8.2]=80-[130-16]=80-114=-34

a) \(80-[130-\left(-3+5^2\right)=\)\(80-[130-\left(-3+25\right)=\)\(80-\left(130-22\right)=\)\(80-108=-28\)

b)\(-\left(-129\right)+\left(-119\right)-301+12\)\(=129+\left(-119\right)-301+12=\)\(10-301+12=-279\)

chưa chắc là mk làm đúng đâu nhé!

a) 78

b)-322.5

c)11700

d)14

a: \(-15-\left(-13+30\right)\)

\(=-15+13-30\)

\(=\left(-15-30\right)+13\)

=-45+13

=-32

b: \(225-150:\left(30+3^2\cdot5\right)\)

\(=225-150:\left(30+9\cdot5\right)\)

\(=225-150:75\)

=225-2

=223

c: \(18\cdot64+18\cdot36-1200\)

\(=18\left(64+36\right)-1200\)

\(=18\cdot100-12\cdot100\)

\(=6\cdot100=600\)

d: \(80-\left[130-\left(12-4\right)^2\right]\)

\(=80-130+\left(12-4\right)^2\)

\(=-50+8^2=64-50=14\)

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

b) 3³ .18 -3³ .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 - 8.2 ) = 80 - 114 = -34

OK

bạn kia làm đúng giồi

cho mình 1 lai nhe

yotube

3³ . 18 - 3³ . 12

= 3³.(18 - 16)

= 3³ . 2

= 27 . 2

= 54

39 . 213 + 87 . 39

= 39.(213 + 87) 

= 39.300

=11700

b) 3³ . 18 – 3³ . 12 = 27 . 18 - 27 . 12 = 486 - 324 = 162;

Lưu ý. Có thể áp dụng tính chất phân phối của phép nhân đối với phép cộng:

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 - 64) = 80 - 66 = 14.