0.86+0.4= 0.62-0.38= 1.6×100= 7.6÷10= 125×29×8=
7.55+0.35= 8-4.3= 10-0.06= 0÷2.89= 6.39-2.76-3.24=
socks shoes those this look at certainly are
B . 铜钥匙
C . 塑料笔外壳
r o a u i |
①lbrary
②hmework 
③plyground
④at room 
⑤msic room 
— No, he doesn't.
(一段话练习)看图,请围绕琥珀中的蝴蝶和花想象一个小故事。

640÷20= 540÷60= 390÷30= 4800÷800=
800×30= 2800÷40= 16×40= 3500÷50=