40,36 × 2 + 20,18 × 3+ 10,09 × 8 – 20,19

0 bình luận về “40,36 × 2 + 20,18 × 3+ 10,09 × 8 – 20,19”

1. Đáp án:

   $=201,79$

   Giải thích các bước giải:

   $40,36 × 2 + 20,18 × 3+ 10,09 × 8 – 20,19$

   $=40,36 × 2 + 20,18 × (2+1)+ 10,09 × 4×2 – 20,19$

   $=40,36 × 2 + 20,18 × 2+20,18+ 40,36×2 – 20,19$

   $=40,36 × 2 + 20,18 × 2+ 40,36×2 – 20,19+20,18$

   $=40,36 × 2 + 40,36×1+ 40,36×2 – 20,19+20,18$

   $=40,36 × 2 + 40,36×1+ 40,36×2 – (20,19-20,18)$

   $=40,36 × 2 + 40,36×1+ 40,36×2 – 0,01$

   $=40,36 × (2 + 1+ 2) – 0,01$

   $=40,36 × 5 – 0,01$

   $=201,8- 0,01$

   $=201,79$

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2. Tính

   `40,36 × 2 + 20,18 × 3 + 10,09 × 8 – 20,19`

   `= 80,72 + 60,54 + 80,72 – 20,19`

   `= 141,26 + 80,72 – 20,19`

   `= 221,98 – 20,19`

   `= 201,79`.  

   Chúc bạn học tốt~

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