a) 20,03 × 45 + 20,03 ×47 +20,03 ×8 b) 15,75 × 175 -15,75 × 55 -15,75 ×20 c) 15 × 91,5 – 150 × 0,85

0 bình luận về “a) 20,03 × 45 + 20,03 ×47 +20,03 ×8 b) 15,75 × 175 -15,75 × 55 -15,75 ×20 c) 15 × 91,5 – 150 × 0,85”

1. a) 20,03.45+20,03.47+20,03.8=20,03(45+47+8)=20,30.100=2003

   b)15.75.175-15,75.55-15,75.20=15,75(175-55-20)=15,75.100=1575

   c)15.91,5-150.0,85=15.91,5-15.10.0,85=15(91,5-8,5)=15.83=1245

   Trả lời

2. a) 20,03 x 45 +20,03 x 47+20,03 x 8

   =20,03x(45+47+8)

   =20,03 x 100

   =2003

   b)15,75 x 175 -15,75 x 55 -15,75 x 20

   =15,75 x ( 175-55-20)

   =15,75 x 100

   =1575

   c) 15 x 91,5 -150 x 0,85

   =15 x (91,5 + 10 x 0,85)

   =15 x 100

   =1500

   Trả lời