摘要:+ 30- +12 85- +6 -25 20+ -
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| 4.5+6.3 | 6.5+4.8 | 8.6+7.7 | 10.05+0.4 |
| 34.6-4.9 | 9-4.2 | 3.45÷10 | 65.5÷10 |
| 9.43÷10 | 3.2÷100 | 2.75×10 | 6.783×100 |
| 0.35×2 | 0.8×6 | 5.2+1.7 | 0.01×8 |
| 1.6×0.3 | 7.31×100 | 3.8×4 | 6.3×0.1 |
| 0.8×0.9 | 0.7×1.2 | 2.5×0.4 | 4.5-1.5 |
| 7.5-0.1 | 0.125×8 | 0.23×0.5 | 9.6+5 |
| 8.36+0.75 | 0.35×6 | 0.83+0.6 | 3.16×2 |
| 0.65×2 | 4.7×0.4×0 | 0.09×6 | 0.4×0.1 |
| 2.3×0.3 | 8.3-2.4 | 5×0.02 | 1.68+3.34 |
| 9.6÷6 | 0.03×1.2 | 0.4+1.5 | 7.9×0.01 |
| 0.45+0.55 | 1.2+43 | 9.2-0.8 | 0.85×4 |
| 10.3+2.9 | 100×0.6 | 0.3×7 | 125×0.8 |
| 2.5×4 | 3.7+4.8 | 7×0.08 | 3.6÷0.6 |
| 9.3+0.7 | 0.162×100 | 4.2÷3 | 0.25×4×1.2. |
| 直接写得数. 60÷3= |
30×20= | 360÷9= | 12×40= |
| 720÷8= | 0÷9= | 70×80= | 30×13= |
| 800÷4= | 0×85= | 540÷6= | 179÷2≈ |
| 39×98≈ | 283÷7≈ | 15+25÷5= | (39-17)÷2= |
口算
(1)70×80=
(2)3.8+2.5+6.2=
(3)
+
--
=
1.4×5=
(4)3.14×3=
+
=
(5)3.99+5.2=
(6)22×0.2=
(7)0.8×0.8=
(8)340÷17=
(9)1.5×4=
(10)0.28×100=
(11)340+120=
+
=
2.5÷5=
(12)12-
-
=
(13)3.08÷0.1=
(14)4.3-2.7=
(15)2.6÷26=
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(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)
| 8 |
| 9 |
| 1 |
| 9 |
| 2 |
| 7 |
| 5 |
| 7 |
| 5 |
| 7 |
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
| 6 |
| 13 |
| 7 |
| 13 |
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
| 1 |
| 4 |
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 4 |
0.5
0.5
4.95×10=49.5
49.5
(12)12-
| 1 |
| 2 |
| 1 |
| 2 |
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
.| 23+19= | 640-450= | 96÷3= | 44+49= |
| 80÷8= | 99÷9= | 84÷4= | 85+28= |
| 7.3-3.6= | 7+9.3= | 5-2.7= | 0÷3= |
| 30×50= | 15×20= | 2000÷4= | 84×0= |
| 580-340= | 5.7+9.1= | 800÷4= | 60×30= |
| 3600÷9= | 25×50= | 13×2000= | 72÷4= |
| 3.5+7.2= | 9.8-2.7= | 120×4= | 892×1= |
| 389+101= | 700×7= | 456-120= | 457+17= |
| 7200÷9= | 88÷4= | 44×2= | 75+25= |
| 25×4= | 50×2= | 70×20= | 900÷3= |
| 10-2.9= | 12+7.8= | 560+40= | 17×4= |
| 23+19= | 640-450= | 96÷3= | 44+49= |
| 80÷8= | 99÷9= | 84÷4= | 85+28= |
| 7.3-3.6= | 7+9.3= | 5-2.7= | 0÷3= |
| 30×50= | 15×20= | 2000÷4= | 84×0= |
| 580-340= | 5.7+9.1= | 800÷4= | 60×30= |
| 3600÷9= | 25×50= | 13×2000= | 72÷4= |
| 3.5+7.2= | 9.8-2.7= | 120×4= | 892×1= |
| 389+101= | 700×7= | 456-120= | 457+17= |
| 7200÷9= | 88÷4= | 44×2= | 75+25= |
| 25×4= | 50×2= | 70×20= | 900÷3= |
| 10-2.9= | 12+7.8= | 560+40= | 17×4= |