Toán Lớp 6: 1024 : 2^5 + 140 : (38 + 2^5) – 7^23 : 7^21
tinh hợp lí nha
help me :))
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Toán Lớp 6: 1024 : 2^5 + 140 : (38 + 2^5) – 7^23 : 7^21
tinh hợp lí nha
help me :))
Comments ( 2 )
1024 : 2^5 + 140 : ( 38 + 2^5 ) – 7^{23} : 7^{21}
= 2^{10} : 2^5 + 140 : ( 38 + 32 ) – 7^2
= 2^5 + 140 : 70 – 49
= 32 + 2 – 49
= 34 – 49
= -15
$1024\::\:2^5\:+\:140\::\:\left(38\:+\:2^5\right)\:-\:7^{23}\::\:7^{21}$
$=\left(1024\::\:2^5\:\right)+\:\left(140\::\:\left(38\:+\:2^5\right)\:\right)-\left(\:7^{23}\::\:7^{21}\right)$
$=32+2-49$
$=-15$