二年级上乘法口算练习题(逆向运算)
白茯苓的美容功效-高二生物试题
5×( )= 30 ( )×7=35 ( )×8= 40
( )×6=30
( )×6= 48 ( )×7= 14 8×(
)=64 8×( )=56
( )×6=18 ( )×7= 21
( )×8=24 ( )×7=28
8×( )=8 (
)×2= 16 8×( )= 32 8×( )=48
4×(
)=24 ( )×7= 28 4×( )= 16 4×( )=12
( )×1= 5 ( )×2= 10 ( )×6=42 ( )×7= 49
4×( )= 20 ( )×5=25 4×( )= 12 (
)×4=16
( )×3= 15 5×( )=30 ( )×8= 56
7×( )=56
3×( )= 9 3×( )=12 2×( )=
10 ( )×5= 15
4×( )= 12 ( )×2=
8 3×( )= 3 3×( )= 9
6×( )= 30 ( )×5= 35 2×( )= 16 ( )×9=18
( )×1= 12 ( )×2= 12 ( )×5=40 6×(
)=30
( )×6= 12 ( )×7= 14 ( )×8=48
( )×6=36
( )×1=7 7×( )=14 (
)×1=5 5×( )=10
( )×3= 21 7×( )=28
( )×3=18 ( )×4=24
( )×6=24 (
)×7=28 6×( )= 36 ( )×2=16
(
)×8=24 ( )×5=15 ( )×1=9 ( )×2=14
6×( )= 18 ( )×4=24 ( )×3=15 (
)×4=20
( )×8=32 ( )×7=28 ( )×6=48
( )×7=56
7×( )=21 ( )×4=2
8( )×6=12 ( )×7=14
( )×6=48 (
)×7=56 ( )×8=64 ( )×4=32
7×( )= 7 7×( )=14 5×( )=40 5×(
)=45
6×( )=48 6×( )=42 ( )×3=21
( )×4=28
( )×5=30 ( )×5=35 (
)×6=36 ( )×7=42
5×( )=30
5
7×( )=42 7
7×( )=56
7
9×( )=72 ( )
7×(
)=21 ( )
3×( )=18 3
8×(
)=40 ( )
( )×3=18 ( )
×(
)=35 ( )
×( )=49 ( )
×( )=63
2
×9=81 9
×4=28 4
×( )=21
6
×5=45 3
×4=24 ( )
×1=9
9
×3=27 ( )
×( )=10 3
×( )=54 (
)
×( )=20 5
×( )= 6 6
×( )=24
( )
×6=42 7
×( )=18
×4=36
×( )=15
×7=63
×(
)=25
×( )=12
×9=27
×( )=49
5×( )= 30 ( )×7=35 ( )×8=
40 ( )×6=30
( )×6= 48 ( )×7= 14
8×( )=64 8×( )=56
( )×6=18 (
)×7= 21 ( )×8=24 ( )×7=28
8×( )=8
( )×2= 16 8×( )= 32 8×( )=48
4×(
)=24 ( )×7= 28 4×( )= 16 4×( )=12
( )×1= 5 ( )×2= 10 ( )×6=42 ( )×7= 49
4×( )= 20 ( )×5=25 4×( )= 12 (
)×4=16
( )×3= 15 5×( )=30 ( )×8= 56
7×( )=56
3×( )= 9 3×( )=12 2×( )=
10 ( )×5= 15
4×( )= 12 ( )×2=
8 3×( )= 3 3×( )= 9
6×( )= 30 ( )×5= 35 2×( )= 16 ( )×9=18
( )×1= 12 ( )×2= 12 ( )×5=40 6×(
)=30
( )×6= 12 ( )×7= 14 ( )×8=48
( )×6=36
( )×1=7 7×( )=14 (
)×1=5 5×( )=10
( )×3= 21 7×( )=28
( )×3=18 ( )×4=24
( )×6=24 (
)×7=28 6×( )= 36 ( )×2=16
(
)×8=24 ( )×5=15 ( )×1=9 ( )×2=14
6×( )= 18 ( )×4=24 ( )×3=15 (
)×4=20
( )×8=32 ( )×7=28 ( )×6=48
( )×7=56
7×( )=21 ( )×4=2
8( )×6=12 ( )×7=14
( )×6=48 (
)×7=56 ( )×8=64 ( )×4=32
7×( )= 7 7×( )=14 5×( )=40 5×(
)=45
6×( )=48 6×( )=42 ( )×3=21
( )×4=28
( )×5=30 ( )×5=35 (
)×6=36 ( )×7=42
5×( )=30
5
7×( )=42 7
7×( )=56
7
9×( )=72 ( )
7×(
)=21 ( )
3×( )=18 3
8×(
)=40 ( )
( )×3=18 ( )
×(
)=35 ( )
×( )=49 ( )
×( )=63
2
×9=81 9
×4=28 4
×( )=21
6
×5=45 3
×4=24 ( )
×1=9
9
×3=27 ( )
×( )=10 3
×( )=54 (
)
×( )=20 5
×( )= 6 6
×( )=24
( )
×6=42 7
×( )=18
×4=36
×( )=15
×7=63
×(
)=25
×( )=12
×9=27
×( )=49