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12.34.2×3.8

答案:28.26
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科目:小学数学 来源: 题型:

0.36÷9= 3.97-2.45= 16×25= 5.2+3.8=
8.282÷8.2= 10-0.87= 4.3+1.8= 18.9-9.8=
0.8÷0.1= 0.3+0.36= 1.14×0.2= 7.8÷3=
0.8×15= 0.125×8= 4-1.08= 9×1.8=
1.2×8= 7.82+1.18= 30.5÷2= 1.8×0.2=
0.75÷30= 0.25×3= 4.8+1.2= 0.5×48=
0.7×7= 1.1×9= 25×0.8= 3.2×5=
3×1.2= 2.04×4= 0.72+2.8= 0×3.97=
0.13×80= 18×30= 50×4.1= 0.125×2=
6×0.75= 1.01-0.89= 9.767×0= 0.02×0.3=
3.9÷5= 1÷0.125= 70÷5= 0÷9.126=
0.72= 16.5÷0.15= 7÷1.4= 1.21÷11=
0.84÷0.42= 0.7×0.9= 0.3×400= 5.1÷0.3=
8.3+1.7= 4.9÷0.7= 0.3+0.3+0.3= 0.81÷0.9×5=
(0.9+8.1)×5= 0.32= 9.3÷(4.2-1.1)= 1.7×0.6÷1.7=

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科目:小学数学 来源: 题型:

直接写出得数:
0.5+0.4=
0.9
0.9
1.4+2.7=
4.1
4.1
8.2+3.7=
11.9
11.9
7.5+2.4=
9.9
9.9
1.8+2.7=
4.5
4.5
7.3+0.9=
8.2
8.2
6.2+5.3=
11.5
11.5
2.0+1.8=
3.8
3.8
5.7+2.8=
8.5
8.5
6.6+2.2=
8.8
8.8
1.5+8.5=
10
10
7.4+1.6=
9
9
7.5-6.5=
1
1
3.2-2.3=
0.9
0.9
0.7+8.3=
9
9

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科目:小学数学 来源: 题型:

180÷60= 12×25= 0÷90=
4×5÷4×5= 0.25×4+4= 131+218+269+182=
25×6×4= 420÷35= 36×5×4=
120÷5÷3= 198-75-25= 120-20÷5=
59亿-58亿= (1.3+3.5)÷0.6= 75÷2.5=
0.45÷1.25÷8= 2.5×7.6×4= 97.6÷0.02=
8.8-(0.25+0.4)= 0.25+87+0.75= 0.8-0.35×2=
0.1÷0.01×0.1= 9.9+9.9×99= 2.7×3.6+6.4×2.7=
720÷8÷9= 2.9+5.7+2.1= 2-0.16-0.64=
16.7+84.5-16.7= 6.8-(3.8+2.9)= 9×1.3+9×6.7=
5.5-5.25+5.2= 0.8×25-10= 42.8×25×4=
7.2+2.8= 0.9÷0.01= 3.5+7.6=
3×0.2×0.5= 0.96÷0.3= 1.5×0.4=
7÷0.25= 2.5×0.7×0.8= 8-2.5=
16÷1.6= 5.6×1.01= 8×(2.5+0.25)=
0.36+0.64= 64.32÷16= 72.8÷0.8=
8.4×0.2+1.6×0.2= 8.4÷4.2= 0.05×0.8=
2.56-0.37= 1.23×3= 25×0.8×0.5=
12×2.5= 3.2÷1.6= 3.5+3.5×3=
19.6÷2= 8.8÷2.2= 3.9+2.03=
7.2×0.3+2.8×0.3= 13.8+9.9= 2.4×2.5=
0.75×4= (1.5+0.25)×4= 4.2÷0.1=
4.2÷3.5= 2.14-0.9= 27+456+73=
12÷0.3= 2.87÷0.7= 13÷4=
24÷4+56÷4= 2.1×0.3÷2.1= 2.3-0÷8.1=
1.37-1.37÷1.37= 4.4÷(5×0.2)= 7×1.3=
0.96÷0.06= 0.36×0.3= 0.35÷0.7=
13.65÷13= 4×0.8×0.25×1.25= 13+0.7÷0.7=
7.05×23.7+7.05×76.3= 0.125×3.2×2.5= (12+23.1÷0.75)×0.4-5.12=
728+199= 637-201= 16×25=
1.6×[(12-7.2)÷(0.84÷2.1)]=

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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

180÷60=12×25=0÷90=
4×5÷4×5=0.25×4+4=131+218+269+182=
25×6×4=420÷35=36×5×4=
120÷5÷3=198-75-25=120-20÷5=
59亿-58亿=(1.3+3.5)÷0.6=75÷2.5=
0.45÷1.25÷8=2.5×7.6×4=97.6÷0.02=
8.8-(0.25+0.4)=0.25+87+0.75=0.8-0.35×2=
0.1÷0.01×0.1=9.9+9.9×99=2.7×3.6+6.4×2.7=
720÷8÷9=2.9+5.7+2.1=2-0.16-0.64=
16.7+84.5-16.7=6.8-(3.8+2.9)=9×1.3+9×6.7=
5.5-5.25+5.2=0.8×25-10=42.8×25×4=
7.2+2.8=0.9÷0.01=3.5+7.6=
3×0.2×0.5=0.96÷0.3=1.5×0.4=
7÷0.25=2.5×0.7×0.8=8-2.5=
16÷1.6=5.6×1.01=8×(2.5+0.25)=
0.36+0.64=64.32÷16=72.8÷0.8=
8.4×0.2+1.6×0.2=8.4÷4.2=0.05×0.8=
2.56-0.37=1.23×3=25×0.8×0.5=
12×2.5=3.2÷1.6=3.5+3.5×3=
19.6÷2=8.8÷2.2=3.9+2.03=
7.2×0.3+2.8×0.3=13.8+9.9=2.4×2.5=
0.75×4=(1.5+0.25)×4=4.2÷0.1=
4.2÷3.5=2.14-0.9=27+456+73=
12÷0.3=2.87÷0.7=13÷4=
24÷4+56÷4=2.1×0.3÷2.1=2.3-0÷8.1=
1.37-1.37÷1.37=4.4÷(5×0.2)=7×1.3=
0.96÷0.06=0.36×0.3=0.35÷0.7=
13.65÷13=4×0.8×0.25×1.25=13+0.7÷0.7=
7.05×23.7+7.05×76.3=0.125×3.2×2.5=(12+23.1÷0.75)×0.4-5.12=
728+199=637-201=16×25=
1.6×[(12-7.2)÷(0.84÷2.1)]=

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