计算
4+8 =
5+7=
7+8=
13-6=
11-5=
12-6=
4+8=12
5+7=12
7+8=15
13-6=7
11-5=6
12-6=6
20, 5, 19, 10, ____, 15, _____, _______.
3, 6, ____, 12, ____, _____.
0, 2, 4, _6___, 8, __10__, ___12__.
20, 5, 19, 10, __18__, 15, __17___, ____20___.
3, 6, __9__, 12, __15__, ___18__.
15里面有( )个十和( )个一。
20里面有( )个十和( )个一。
13 is made up of ( ) tens and ( ) ones.
8 is made up of ( ) tens and ( ) ones.
15里面有( 1 )个十和( 5 )个一。
20里面有( 2 )个十和( 0 )个一。
13 is made up of ( 1 ) tens and ( 3 ) ones.
8 is made up of ( 0 ) tens and ( 8 ) ones.
Sandy has 14 apples. She ate 7 apples. How many apples does Sandy have left?
14-7=7
Sandy has 7 apples left.
5+( )=13
14-( )=7
( )+5=14
17-( )=9
( )-2=9
5+(8)=13
14-(7)=7
(9)+5=14
17-(8)=9
(11)-2=9
2, 4, 8, ____, 20.
19, 17, _15___, 13, ___11__, __9___.
2, 4, 8, __14__, 22.
8, 5, 14, 13, 7
选择3个数组成一个算式组。5+8=13
8+5=13
13-5=8
13-8=5
Sandy is buying fruit. She bought 4 apples, 7 oranges, and 3 watermelons. How many fruit did she buy altogether?
4+7+3=14
She bought 14 fruit altogether.
4+6-5=
9+9-8=
11-4+6=
12-6+9=
4+9-7=
17-4-9=
4+6-5=
9+9-8=10
11-4+6=13
12-6+9=15
4+9-7=6
17-4-9=4
___, 4, ____, 8, 10, 12.
____, 18, 16, _____, 12, ____.
_____, 15, 10, _____.
_2__, 4, ___6_, 8, 10, 12.
__20__, 18, 16, __14___, 12, __10__.
___20__, 15, 10, __5___.
6+7=
第一步：
第二步：
16-8=
第一步：
第二步：
6+7=13
第一步：7+3=10
第二步：10+3=13
16-8=8
第一步：10-8=2
第二步：2+6=8
A subway is traveling to Hongqiao station. At the first stop 13 people got on. At the second stop 5 people got off. At the third stop 9 more people got on. How many people are on the subway right now?
13-5+9=17
17 people are on the subway right now.
3+5-( )=6
5+( )+3=17
12+4-( )=9
( )-6-2=6
18-( )-7=2
12+6-( )=9
3+5-(2)=6
5+(9)+3=17
12+4-(7)=9
(14)-6-2=6
18-(9)-7=2
12+6-(9)=9
1, 3, 5, ____, _____, ______.
18, 1, 18, 4, _____, 7, ______, ______, _______.
20, 2, 18, 4, 16, _____, _____，______, ______.
1, 2, 4, 7, ____, 16, ______, ______.
1, 3, 5, __7__, __9___, ___11___.
18, 1, 18, 4, _18_, 7, _18_, __10_, _18__.
20, 2, 18, 4, 16, _6_, __14_，_8_, _12_.
1, 2, 4, 7, _11_, 16, __21__, _27_.
小亚在排队。从前面数起，她排在第4名。从后面数起，她排在第9名。请问一共有几位小朋友在队伍里？
4+8=12
一共有12位小朋友在排队。
Eileen is in a line. There are 9 people in front of her. From the back she is the fourth in line. How many people are in line?
There are 13 people in line.
16-( )+5=12
( )-5+8=14
14-7+( )=12
4+7-( )=5
( )+4+8=17
13-( )+9=17
16-( )+5=12
(11)-5+8=14
14-7+(5)=12
4+7-(6)=5
(5)+4+8=17
13-(5)+9=17
18, 14, _____, 6, _____.
22, 21, 19, _____, 12, _____, ______.
20, 3, 18, 6, _____, 9, 14, _____, _____.
18, 14, _10_, 6, _2_.
22, 21, 19, _16_, 12, _7_, _1_.
20, 3, 18, 6, _16_, 9, 14, _12__, _12__.
小胖在排队。有17位小朋友在排队。小胖排在第6名。请问他后面有几位小朋友？
17-6=11
他后面有11位小朋友。
Adam has some cookies. He ate 7 in the morning. He bought 6 more in the afternoon. He has 13 left by the end of the day. How many cookies did he have at first?
(14)-7+6=13
He had 14 cookies at first.