Question

Tính bằng cách thuận tiện

a) 3,47 × 1/2 - 2,47 : 2 + 0,5

b) 3,67 × 0,125 + 4,66 × 1/16 + 0,25

Answer 1

\(a,3,47\times\dfrac{1}{2}-2,47:2+0,5=a,3,47\times\dfrac{1}{2}-2,47\times\dfrac{1}{2}+\dfrac{1}{2}=\dfrac{1}{2}\times\left(3,47-2,47+1\right)=\dfrac{1}{2}\times2=1\)