Có câu mình sửa lại đề.
\(11070:15.\left[356-\left(3110-3000\right)\right]\)
\(=11070:15.\left[356-110\right]\)
\(=11070:15.246\)
\(=738.246\)
\(=181548\)
________________
\(720-\left\{40.\left[\left(120-70\right):25+2^3\right]\right\}\)
\(=720-\left\{40.\left[50:25+8\right]\right\}\)
\(=720-\left\{40.\left[2+8\right]\right\}\)
\(=720-\left\{40.10\right\}\)
\(=720-400\)
\(=320\)
_____________
\(1024:2^5+140:\left(38+2^5\right)+7^{23}:7^{21}\)
\(=1024:2^5+140:70+7^2\)
\(=32+140:70+49\)
\(=32+2+49\)
\(=34+49\)
\(=83\)
a) 11070:15.[356-(3110-3000)]
= 11070:15.[356-110]
= 11070:15.246
= 738.246
= 181548
b) 720-{40.[(120-70):25+2^3)]}
= 720-{40.[50:25+8]}
= 720-{40.[2+8]}
= 720-{40-10}
= 720-30
= 690
c) 1024:22^5+140:(38+2^5)+7^23:7^21
= 1024:5153632+140:(38+32)+7^23:7^21
= \(\dfrac{32}{161051}\)+140:70+7^2
= \(\dfrac{32}{161051}\)+2+49
= 51\(\dfrac{32}{161051}\)
(Tớ nghi câu c có chỗ sai đề:<)
