Toán 1 tính a, (-1/4-2/3)^2 b,|-3/4|+1/4+(-1)^2020. C,6^2×10^3/2^4×15^2 d,(4/5)^10÷8/25 27/07/2021 By Sarah 1 tính a, (-1/4-2/3)^2 b,|-3/4|+1/4+(-1)^2020. C,6^2×10^3/2^4×15^2 d,(4/5)^10÷8/25
a, `(-1/4-2/3)^2=(-3/12-8/12)^2=(-11/12)^2=121/144` b, `|-3/4|+1/4+(-1)^2020` `=3/4+1/4+1=1+1=2` c, `((6^2).(10^3))/((2^4).(15^2))=((2^2).(3^2).(5^3).(2^3))/((2^4).(3^2).(5^2))=((2^5).(3^3).(5^3))/((2^4.(5^2).(3^2)“ =2.5=10` d, `(4/5)^10:8/25` `=4^10/5^10 . 25/8` `= 4^9/((5^8).2) = 131072/390625` Trả lời
a, `(-1/4-2/3)^2=(-3/12-8/12)^2=(-11/12)^2=121/144`
b, `|-3/4|+1/4+(-1)^2020`
`=3/4+1/4+1=1+1=2`
c, `((6^2).(10^3))/((2^4).(15^2))=((2^2).(3^2).(5^3).(2^3))/((2^4).(3^2).(5^2))=((2^5).(3^3).(5^3))/((2^4.(5^2).(3^2)“ =2.5=10`
d, `(4/5)^10:8/25`
`=4^10/5^10 . 25/8`
`= 4^9/((5^8).2) = 131072/390625`