(共17张PPT)
8+(
)=13
8+(
)=14
8+(
)=15
8+(
)=16
5
6
7
8
7+(
)=13
7+(
)=11
7+(
)=17
7+(
)=16
6
10
4
9
17
-
9=(
)
11
-
9=(
)
19
-
9=(
)
13
-
9=(
)
8
2
10
4
13-9=4
方法三:9+(4)=13
13-9=4(做减想加)
方法一:13-3=10
10-6=4(平十法)
方法二:10-9=1
1+3=4(破十法)
十几减8、7
拿走8把,还剩多少把?
15
-
8
=
?
拿走8根,还剩多少根?
15-8=
7
想:
10-8=2
2+5=7
15-8=
7
想:
15-5=10
10-3=7
15-8=
7
想:
8+(
)=15
15-8=7
7
8
6
先圈一圈,再计算。
4
7
4
7
第一关
14颗
?颗
?个
16个
6
9
第二关
11
3
17
9
12
5
5
8
4
11-8
=
2+1
=3
12-8
=
13-8
=
14-8
=
16-8
=
15-8
=
17-8
=
2+2
=4
2+3
=5
2+4
=6
2+5
=7
2+6
=8
2+7
=9
十几-8=几加2
11-7
=
3+1
=4
12-7
=
13-7
=
14-7
=
16-7
=
15-7
=
3+2
=5
3+3
=6
3+4
=7
3+5
=8
3+6
=9
十几-7=几加3
十几-9=几加1
11
-
9
=
2
12
-
9
=
3
13
-
9
=
4
14
-
9
=
5
15
-
9
=
6
16
-
9
=
7
17
-
9
=
8
18
-
9
=
9
十几-8=几加2
11
-
8
=
3
12
-
8
=
4
13
-
8
=
5
14
-
8
=
6
15
-
8
=
7
16
-
8
=
8
17
-
8
=
9
十几-7=几加3
11
-
7
=
4
12
-
7
=
5
13
-
7
=
6
14
-
7
=
6
15
-
7
=
8
16
-
7
=9
7
6
分享你今天的收获吧!