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(1)2(    )=11

(2)4(    )=13

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科目:小学数学 来源: 题型:

口算
1.2÷0.2=
2.5×4= 0.25+4= 1.87×0=
3.5+0.5= 1.2÷0.4= 3.6÷4= 0÷1.25=
0.12×6= 0.64×0.03= 5.8+4.2-6.5= 7.8÷3=
0.125×8= 2.8÷1.4= 0.25÷0.5= 7.21÷7=
0.35÷10= 3.6÷3= 6.3÷0.9= 0.54÷6=
0.3×0.1= 1.3÷2= 0.4÷8=2 7.3÷3=
0.51÷0.3= 15÷0.01= 5÷10= 0.7×12=
0.2×0.5= 3.8×0.1= 0.2×0.2= 0.04×0.4=
12.4+7.6= 8×0.5= 0.72÷36= 9×2.5+2.5=
1.8÷3= 2.3÷2= 6.5÷5= 2.14÷2=
2.5×4= 2.7×2= 0.5×7= 4.8+3.6+5.2=
3.4÷1.7= 2.5+0.2= 4.5÷5= 5+2.8=
0.8×0.3= 13.5×2×0= 5.25÷5= 4×2.2=
0.12×0.5= 1.8×5= 6.24÷2= 2.83-1.43=
1.2+2.9= 3.8÷2= 1.32×3= 4.6×7=

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科目:小学数学 来源: 题型:

3.2×0.2= 1.4×0.4= 3.3÷3= 1.2÷0.3= 0.56÷8=
2.5×0.4= 1.5×2= 0.7×7= 7.3+0.3= 1.23×3=
0.53-0.3= 1.8×0.5= 0.9×0.01= 0.23×3= 1.6÷0.04=
2-1.2= 7.8÷6= 8.4÷0.21= 8.4÷0.7= 1.23×3=
5.6+3.6= 9-2.35= 0.56÷8= 7.3+2.7= 4.8÷1.2=
5.6÷0.4= 4.5÷0.9= 8.1×2= 90÷3= 7.2÷0.9=
1.23+3= 5.6+1.23= 4.5×2= 5.6÷1.4= 6.6÷1.1=
2.1÷3= 0.6×0.5= 3.23×2= 1.8÷3= 7.2÷6=
12.5÷0.1= 0.32÷0.8= 1.6+3.7= 0.45×0.2= 4.8÷0.08=
0.36÷1.8= 0.4×0.5= 8.4+5.6= 8.4÷2.1= 1.8×0.4=
0.01×8= 7.31×100= 0.09×6= 0.8×0.6= 3+2.3=
1.25×8= 3÷5= 2.3+2.3= 6.23+3.6= 9.3÷3=
4.8÷0.8= 7.5-4.5= 5.7+4.3= 0.75÷15= 1÷0.25=
1.2×60= 6÷0.2= 0.21×4= 0.25×4×9= 2.33×1.2=
0.62÷0.62-1= 5+3.2÷0.8= 7.5÷2.5×0= 3.9×0.01= 0.001+10.099=
3-0.98= 6×0.25= 0.63÷0.9= 8.95÷0.895=

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科目:小学数学 来源: 题型:

3.2+4.8= 6.3-0.94= 0.25×4= 5×1.2=
4.8÷0.6= 4.8÷24= 3.6-2.4= 6-4.6=
8-3.4= 6×0.21= 1.25×8= 0.8÷0.5=
25×0.3= 0.63-0.3= 2.5+7.5= 34×0.1=
7-0.99= 21÷0.7= 5×2.4= 3×1.03=
3.2÷4= 1.5÷30= 5.1÷3= 0.37÷0.37=
0.28÷14= 0.16÷4= 8×0.05= 4×0.125=
4÷8= 7.5-0.7= 9-0.9= 7÷2=
2.8÷0.7= 21-0.21= 5÷0.01= 2.8×0=
7÷0.07= 6.3÷0.5= 0.32÷0.8= 1÷0.25=
0.25×0.4= 30×2.3= 3.6÷1.2= 2.5+1.2=
3.5×0.2= 9÷0.45= 0.96÷0.16= 4.8-2.9=
0.5÷0.25= 7.6+2.4= 0.17×0.4= 8.2×0.01=
1.72-0.73= 0.46÷2= 1.9×0.8= 1.2×0.3=
1-0.92= 0.16×0.7= 0.56÷0.16= 8÷0.6=

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科目:小学数学 来源: 题型:

观察已知算式,寻找规律填空.
(1)1=1×2÷2
1+2=2×3÷2
1+2+3=3×4÷2
1+2+3+4=4×
5
5
÷2
1+2+3+4+5=
5
5
×
6
6
÷
2
2

1+2+3+4+5+6+7=
7
7
×
8÷2
8÷2

1+2+3+…+n=
n
n
×
(n+1)÷2
(n+1)÷2

(2)1×2=1×2×3÷3
1×2+2×3=2×3×4÷3
1×2+2×3+3×4=3×4×5÷
3
3

1×2+2×3+3×4+4×5=4×5×
6
6
÷
3
3

1×2+2×3+3×4+4×5+5×6=
5
5
×
6
6
×
7÷3
7÷3

1×2+2×3+3×4+…+n×(n+1)=
n
n
×
(n+1)
(n+1)
×
(n+2)
(n+2)
÷
3
3

(3)1×2×3=1×2×3×4÷4
1×2×3+2×3×4=2×3×4×5÷4
1×2×3+2×3×4+3×4×5=3×4×5×
6
6
÷4
1×2×3+2×3×4+3×4×5+4×5×6=
4
4
×
5
5
×
6
6
×
7
7
÷
4
4

1×2×3+2×3×4+3×4×5+4×5×6+5×6×7=
5
5
×
6
6
×
7
7
×
8
8
÷
4
4

1×2×3+2×3×4+…+n×(n+1)×(n+2)=
n
n
×
(n+1)
(n+1)
×
(n+2)
(n+2)
×
(n+3)
(n+3)
÷
4
4

猜一猜:
1×2×3×4+2×3×4×5+3×4×5×6=
3×4×5×6×7÷5
3×4×5×6×7÷5

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科目:小学数学 来源: 题型:解答题

3.2+4.8=6.3-0.94=0.25×4=5×1.2=
4.8÷0.6=4.8÷24=3.6-2.4=6-4.6=
8-3.4=6×0.21=1.25×8=0.8÷0.5=
25×0.3=0.63-0.3=2.5+7.5=34×0.1=
7-0.99=21÷0.7=5×2.4=3×1.03=
3.2÷4=1.5÷30=5.1÷3=0.37÷0.37=
0.28÷14=0.16÷4=8×0.05=4×0.125=
4÷8=7.5-0.7=9-0.9=7÷2=
2.8÷0.7=21-0.21=5÷0.01=2.8×0=
7÷0.07=6.3÷0.5=0.32÷0.8=1÷0.25=
0.25×0.4=30×2.3=3.6÷1.2=2.5+1.2=
3.5×0.2=9÷0.45=0.96÷0.16=4.8-2.9=
0.5÷0.25=7.6+2.4=0.17×0.4=8.2×0.01=
1.72-0.73=0.46÷2=1.9×0.8=1.2×0.3=
1-0.92=0.16×0.7=0.56÷0.16=8÷0.6=

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