Question

Tính nhanh :

75% + 18/21 + 19/32 + 25% + 3/21 + 13/32

35 x 11 x 0,1 x 0,25 x 100 x ( 3 : 0,4 - 7,5)

 

Answer 1

a: \(=\left(\dfrac{3}{4}+\dfrac{1}{4}\right)+\left(\dfrac{18}{21}+\dfrac{3}{21}\right)+\dfrac{19}{32}+\dfrac{13}{32}=1+1+1=3\)

b: \(=35\cdot1.1\cdot25\cdot\left(7,5-7,5\right)=0\)

Answer 2

a: =(34+14)+(1821+321)+1932+1332=1+1+1=3=(43​+41​)+(2118​+213​)+3219​+3213​=1+1+1=3

b: $=35\cdot 1.1\cdot 25\cdot \left(7,5-7,5\right)=0$