Tính nhanh :
a) 3416 +1025 + 6584 =..................................................................................................................
b) 15 x 2 + 15 x 3 + 15 x 5 =...........................................................................................................
a: =10000+1025=11025
b: =15x(2+3+5)=150
\(a,\left(3416+6584\right)+1025=11025\\ b,15\times\left(2+3+5\right)=150\)