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a) 113 . 59 -59 . 57 + 56 . 41
= 59(113-57)+56.41
= 59.56+56.41
=56(59+41)
= 56.100
= 5600
b) 23 . 5 - 321:319+80
=23.5-321-19+1
= 8.5 - 32 +1
=40 - 9 +1
= 32
c) 194.12+6.437.2+3.369.4
= 194.12 + 437.12 + 12.369
= 12(194+437+369)
=12.(631+369)
= 12.1000
=12000
Bạn xem lại câu c xem đề bài có đúng như mình làm ko nhé. hình như bạn sai đề câu c thì phải
a) 220 - [32 . 33 - (12 - 70) 2]
= 220 - [9 . 27 - (12 - 1)2]
= 220 - [9 . 27 - 112]
= 220 - [9 . 27 - 121]
= 220 - [243 - 121]
= 220 - 122
= 98
b) [504 - (52 . 8 + 70) : 33 + 6] : 125
= [504 - (25 . 8 + 70) : 27 + 6] : 125
= [504 - (200 + 70) : 27 + 6] :125
= [504 - 270 : 27 + 6] : 125
= [504 - 10 + 6] : 125
= [494 + 6] : 125
= 500 : 125
= 4
c) 27 . 23 + 4 . 32 - 5 . 120
= 27 . 8 + 4 . 9 - 5 . 1
= 216 + 36 - 5
= 252 - 5
= 247
d) 316 - (5. 2 . 22 + 24) : 23 - 3 . 23
= 316 - (5 . 2 . 4 + 16) : 8 - 3 . 8
= 316 - (40 + 16) : 8 - 3 . 8
= 316 - 56 : 8 - 3 . 8
= 316 - 7 - 3 . 8
= 316 - 7 - 24
= 309 - 24
= 285
\(\left[504-\left(5^2.8+70\right):3^3+6\right]:25\)
\(\left[504-\left(25.8+70\right):27+6\right]:25\)
\(\left[504-\left(200+70\right):27+6\right]:25\)
\(\left[504-270:27+6\right]:25\)
\(\left[504-10+6\right]:25\)
\(\left[494+6\right]:25\)
\(500:25\)
= 20
\(\left[504-(5^2\cdot8+70):3^3+6\right]:25\)
\(=\left[504-(25\cdot8+70):27+6\right]:25\)
\(=\left[504-(200+70):27+6\right]:25\)
\(=\left[504-270:27+6\right]:25\)
\(=\left[504-10+6\right]:25\)
\(=\left[494+6\right]:25\)
\(=500:25=20\)
\(\text{Ko chắc }:)\)
a/ \(\left(-19\right)+5+\left(-8\right)+19+\left(-3\right).\left(-2\right)^3\)
\(\left(-19\right)+5+\left(-8\right)+19+\left(-3\right).\left(-8\right)\)
\(\left(-19\right)+5+\left(-8\right)+19+24\)
\(\left(-14\right)+11+24\)
\(\left(-3\right)+24=21\)
b/ \(\left(-5\right)^3-\left(3^3+4\right).\left(-2\right)+\left(3-27\right):4\)
\(\left(-125\right)-\left(27+4\right).\left(-2\right)+\left(3-27\right):4\)
\(\left(-125\right)-\left(31\right).\left(-2\right)+\left(-24\right):\text{4}\)
\(\left(-125\right)-\left(-62\right)+\left(-6\right)\)
\(\left(-63\right)+\left(-6\right)=-69\)
c/ \(\left[504-\left(5^2.8+70\right):3^2+6\right]:\left(-20\right)\)
\(\left[504-\left(25.8+70\right):9+6\right]:\left(-20\right)\)
\(\left[504-270:9+6\right]:\left(-20\right)\)
\(\left[504-30+6\right]:\left(-20\right)\)
\(480:\left(-20\right)=-24\)
d/ \(\left(-7\right)-\left[\left(-19\right)+21\right].\left(-3\right)-\left[32+\left(-7\right)\right]\)
\(\left(-7\right)-2.\left(-3\right)-25\)
\(\left(-7\right)-\left(-6\right)-25\)
\(\left(-1\right)-25=-26\)
\(\)
17 *75 +25.17-34.25
=17.75+25.17-17.2.25
=17.75+25.17-17.50
=17(75+25-50)
=17.50
=850
17.75+25-34.25
17.(75+25)-34.25
17.100-17.2.25
17.100-17.50
17.(100-50)
17.50
850