三、写出和是14的算式。
( )+( )=14 ( )+( )=14 ( )+( )=14
( )+( )=14 ( )+( )=14 ( )+( )=14
( )+( )=14 ( )+( )=14 ( )+( )=14
( )+( )=14 ( )+( )=14 ( )+( )=14
( )+( )=14 ( )+( )=14 ( )+( )=14
参考答案:
一、
1:右,十;
2:12;
3:15,2;
4:1,6,十,1,1;
5:17,19;
6:9,11;
7:15,14,13,12;
8:13,13;
9:14,2;
10:8,9,10,11,12;
11:12,7,19,4;
12:10-3 14-5 20-10 11+2 7+7 13+5;
13:6,17,4,4;
14:5+5>5 5-5<5 5<5+5 5="">5-5;
二、
1:14;
2:2+7;
3:17;
4:7+2+4=13;
5:1个十和4个一;
6:9;
7:11-6=5;
三、
(0)+(14)=14 (1)+(13)=14 (2)+(12)=14(3)+(11)=14
(4)+(10)=14 (5)+(9)=14 (6)+(8)=14 (7)+(7)=14
(8)+(6)=14 (9)+(5)=14 (10)+(4)=14 (11)+(3)=14
(12)+(2)=14 (13)+(1)=14 (14)+(0)=14