Question

tính

a,[116-(13-5²)]

b,7²⁵:(7²¹.46+7²¹.3)

c,57+212+43+288

d,28.69+4.18.7+2.14.13

tớ đang gấp lắm giúp tớ với

Answer 1

\(\left[116-\left(13-5^2\right)\right]=\left[116-\left(13-25\right)\right]=116-13+25=128\)

\(\frac{7^{25}}{7^{21}\times46+7^{21}\times3}=\frac{7^{25}}{7^{21}\times\left(46+3\right)}=\frac{7^4}{50}\)

\(57+212+43+288=\left(57+43\right)+\left(212+288\right)=100+500=600\)

\(28\times69+4\times18\times7+2\times14\times13=28\times69+18\times28+28\times13=28\times\left(69+18+13\right)=28\times100=2800\)