(1)
(2)
□+□=□ □-□=□
(3)
□○□○□=□
__________、____________________、__________
5+7=( )
9+9=( )
14+( )=20
①白兔和黑兔一共有几只?
6+7
②白兔和花兔一共有几只?
7+5
③黑兔和花兔一共有几只?
7+5+6
④白兔、黑兔和花兔一共有几只?
5+6
列式:_______________
列式:________________
①10+8
②15-10
③17-3
④19-4
⑤2+10
a.10-5
b.18-6
c.10+4
d.9+9
e.11+4
列式:_____________________
列式:______________;_______________
列式:_________________
列式:____________________