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科目:小學(xué)數(shù)學(xué)
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題型:
請觀察下列算式,找出規(guī)律并填空.
=1-
,
=
-
,
=
-
,
=
-
(1)則第10個算式是
=
,
(2)第n個算式為:
=
.
(3)根據(jù)以上規(guī)律解答下題:
若有理數(shù)a,b滿足a=1,b=3,試求
+
+
+…+
的值.
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科目:小學(xué)數(shù)學(xué)
來源:
題型:
口算
(1)70×80=
5600
5600
3.7×0.5=
1.85
1.85
3.2×100=
320
320
8.9-3.8=
5.1
5.1
(2)3.8+2.5+6.2=
12.5
12.5
12-6.2-3.8=
2
2
1.7+0.43+3.3=
5.43
5.43
3.4-1.5-0.5=
1.4
1.4
(3)
+
--
=
1.4×5=
7
7
650-470=
180
180
79+2.1=
81.1
81.1
(4)3.14×3=
9.42
9.42
6.7+3.4=
10.1
10.1
2.01×0.4=
0.804
0.804
+
=
1
1
(5)3.99+5.2=
9.19
9.19
23+6.68=
29.68
29.68
7×0.08=
0.56
0.56
0.25×0.4=
0.1
0.1
(6)22×0.2=
4.4
4.4
99.9+1=
100.9
100.9
0.72÷6=
0.12
0.12
3.9÷1.3=
3
3
(7)0.8×0.8=
0.64
0.64
5.88+3.12=
9
9
1.9+2.1=
4
4
26÷2.6=
10
10
(8)340÷17=
20
20
9.3÷0.3=
31
31
13×4=
52
52
3.6×5=
18
18
(9)1.5×4=
6
6
20×16=
320
320
28×3=
84
84
3.2÷4=
0.8
0.8
(10)0.28×100=
28
28
3200÷1000=
3.2
3.2
0.5×100=
50
50
4×0.125=
0.5
0.5
(11)340+120=
460
460
+
=
2.5÷5=
0.5
0.5
4.95×10=
49.5
49.5
(12)12-
-
=
11
11
1÷0.25=
4
4
5×0.13=
0.65
0.65
12×0.05=
0.6
0.6
(13)3.08÷0.1=
30.8
30.8
0.35×6=
2.1
2.1
25÷0.5=
50
50
1.5×3=
4.5
4.5
(14)4.3-2.7=
1.6
1.6
8.1÷0.9=
9
9
12÷1.2=
10
10
0.48÷6=
0.08
0.08
(15)2.6÷26=
0.1
0.1
0.72×5=
3.6
3.6
4.8+3.2=
8
8
5.7÷0.3=
19
19
.
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科目:小學(xué)數(shù)學(xué)
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題型:
0.56÷0.04= |
1.44÷2= |
24.6÷0.6= |
4.5÷0.15= |
0.63÷0.09= |
12.84÷1.2= |
3.9÷0.13= |
1.6÷1.6= |
20÷0.25= |
1.3÷2.5= |
100÷12.5= |
7.8÷0.13= |
3.24÷0.8= |
13×1.1= |
5.46÷3= |
4.07×3= |
5.28t-1.99t= |
0.6+89= |
5.7×0.1= |
1.6÷0.4= |
6÷0.3= |
5÷0.25= |
0.45×3= |
0.35×8= |
7.1-0.76= |
1.2×0.3= |
0.76÷4= |
1.9×0.8= |
4.2-2.8= |
7.2÷1.6= |
19.8+3.2= |
18-17.45= |
4.5+1.5= |
0.75x+0.25x= |
2.5×4= |
0.46÷2= |
0.7×1.4= |
1-0.92= |
8×0.125= |
3.4÷20= |
10a-1.8a= |
4.8×0.2= |
0.3÷0.15= |
0.15÷2= |
0.2×0.5= |
2.2-1.8= |
3.1+1.75= |
32.8+1.9= |
0.42×0.5= |
0.76+1.24= |
3.06-0.72= |
0.51÷17= |
5.2÷13= |
8.2×0.01= |
1.72-0.73= |
1.6×0.4= |
4.8b+3.2b= |
2.5×4= |
0.3×101= |
1.2×0.5= |
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科目:小學(xué)數(shù)學(xué)
來源:
題型:
脫式計算.你是最棒的! 1-×{1-×[1-×(1-)]} |
55×+145× |
9999×9999+19999 |
77×13+255×999-510 |
x-3+(2x-5)=17 |
55%x-(0.25x+0.6)=0.6. |
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科目:小學(xué)數(shù)學(xué)
來源:
題型:
7×5= |
÷= |
+= |
×= |
1+-0.4= |
+0.75= |
+= |
÷9= |
+= |
×0.4= |
4÷= |
×= |
(2+)×(1+)= |
×9= |
+= |
4÷= |
+1= |
5-(2+)= |
4.5÷= |
39×= |
11×(10+)= |
11+(3+)= |
×= |
8×= |
12-(6+)= |
1÷(1+)= |
20÷20%= |
1÷0.01= |
1.12= |
9.9÷(1+)= |
81÷= |
1.65-0÷1.65= |
××= |
5-1.4-1.6= |
(0.18+0.9)÷9= |
8××1.25= |
1.25×0.16×8= |
+7.3÷10%= |
+9-0.2= |
5.08-0.74-1.26= |
×0.2= |
1-.0375÷= |
8÷0.5+×(1+)= |
(+)×24= |
10(3+)÷(3+)= |
(3++5++2+)-(5+)= |
+÷+= |
1--= |
3-(2+)+(2+)= |
-÷3= |
0×(3+)+(1+)= |
+-+= |
0.125×64×0.125= |
×8+8×= |
+×16= |
-+= |
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