C1:42.98-{[(18-2^3):2+3^2]} C2:(56.46-25.23):23 C3 1024:(-2^4)+140:(38+2^5)-7^23:7^21

0 bình luận về “C1:42.98-{[(18-2^3):2+3^2]} C2:(56.46-25.23):23 C3 1024:(-2^4)+140:(38+2^5)-7^23:7^21”

1. $C1$ $42.98 – [(18-2^3) : 2 + 3^2]$

   $= 42.98 – [(18-8):2 + 9]$

   $= 42. 98 – 14$

   $= 14.(3.98-1)$

   $= 4102$

   $C2. (56.46 – 25.23) : 23$

   $= 56.46:23 – 25.23:23$

   $= 56.2 – 25$

   $= 112 – 25$

   $= 87$

   $C3.1024:(-2^4)+140:(38+2^5)-7^23:7^21$

   $= 1024 : 16 + 140 : 70 – 49$

   $= 64 + 2 – 49$

   $= 17$

   Bình luận

2. 1. 42.98−[(18−23):2+32]42.98−[(18−23):2+32]

   =42.98−[(18−8):2+9]=42.98−[(18−8):2+9]

   =42.98−14=42.98−14

   =14.(3.98−1)=14.(3.98−1)

   =4102=4102

   2 .(56.46−25.23):23C2.(56.46−25.23):23

   =56.46:23−25.23:23=56.46:23−25.23:23

   =56.2−25=56.2−25

   =112−25=112−25

   =87=87

   3 .1024:(-2^4)+140:(38+2^5)-7^23:7^21$

   =1024:16+140:70−49=1024:16+140:70−49

   =64+2−49=64+2−49

   =17

    Chúc bạn hok tập tốt ạ

   Bình luận