Question

Tính nhanh : 

a) 3416 +1025 + 6584 =..................................................................................................................

b) 15 x 2 + 15 x 3 + 15 x 5 =...........................................................................................................

Answer 1

\(a,3416+1025+6584\\ =\left(3416+6584\right)+1025\\ =10000+1025\\ =11025\\ b,15\times2+15\times3+15\times5\\ =15\times\left(2+3+5\right)\\ =15\times10\\ =150\)

Answer 2

a,3416+1025+6584=(3416+6584)+1025=10000+1025=11025b,15×2+15×3+15×5=15×(2+3+5)=15×10=150

Answer 3

a)3416+1025+6584

=(3416+6584)+1025

=10 000+1025

=11 025

Answer 4

a) 11025

b)150