(完整版)人教版小学数学五年级上册口算题卡(全册)

1
人教版小学数学五年级上册口算题卡
0.16 X 5 =
1.78 X
2.2 1.2X 5=
0.7 X 0.01=
2.5X 0.4 =
1.25X 8= 6.6 X 0.6 =
5.37X 5=
9.6 X 0.6 =
123.9X 7= 53X2=
55X 3=
16.9X 0.3=
2.37＋6.3= 2.37＋
3.7=
2.5X 1.25=
4.4X 25= 2.64 X 5= 3.8X 10.1=
0.98
X 0.7=
第一单元
2.3 X 0.15=
0.78 X 5 =
5X 0.78 = 5.3 X 42=
5.24 X 0.99= 10.65
X 0.22=
1X 0.125= 0.125 X 11=
4.39X 10= 4.39
X 0.1=
0.7X2 3= 0.47 X 0.7=
0.7X0.57=
3
X 1.21= 12X 0.03= 0.03 X 0.12= 3X 0.121= 8.6 X 0.7=
7.6 X 0.23= 16.73
X 2.5=
8.53X0.99 = 7.3 X 5= 5.8X0.29= 5.8 X 2.9= 8.6 X 18= 1.42 X 18= 1.4 X 15= 0.1 X 0.2 =
2
3.57 X 5=
4.2 X 0.1 = 99X 0.35 =0.05 X 0.8 = 1.23 X 3=0.36 X 12= 7.5X2.5X4= 1.7 X 0.43 = 1.2 X 0.4= 1.3 X 0.4=
5.43X 0.86= 78.58
X 3.7=
0.85X 1.01 = 5.29
X 2.3=
0.1 X 0.01 = 0.28 X 35=
4.68X 4.5= 0.25
X 0.5=
2.5 X 1 .25= 25.7
X 3.29=
6.71 X 25.7= 6.5
X 5 6.5=
1X 0.85= 4.73 X 3.9=
47.3 X3.9= 47.3 X 0.391 = 3
0.473 X 0.39 = 2.4 X 5= 4
1X 1.25= 0.45 X 0.09= 6.2X 0.03= 0.125 X 0.125= 9.9X 2.5X 0.4= 9 X 0.18 = 0.25X 16= 0.7 X 8 = 3.05X 4= 6.8
X 2 = 5.2X 3.05X 4.8=
1.05
X 0.1 = 17.5X 7.5X 2= 4.2 X 21= 10.81X 4.6 X 0.18=
0.65
＋3.48＋
0.45=
46.3X 33.5＋46.3X 66.5= 10.48 X 0.94= 47X 1.2= 5.64 －2.1= 1.25X 80= 0.77
X 1.1=
1.2-0.08=
8- 0.52=
2.5 X
3.6 =
4. 9.4
X 6=
5
5.0.8 X 0.92=
1.2
X 3.6=
1.4 X 1.2=
5.6X 0.9 =
8.2 X 1.1 =
0.7X5=_
3.5X 1 .6= 0.27 X 0.036= 0.1 X 250= 6.64 X 3.3= 12.5X 88 =
4.2 X 0.7 X 6=
10.2X 35 =
5.6
X 3.5=
7.2X 48 =
52X 7.2 = 16.7-0.92-1.08 =
16.8+1.6=
1.8 X 4.5 = 3.8+5.6= 0.7X 4 =
1.8+0.28 =
5X 4.8 =
0. 75+ 0. 8=
6
13.5X 6 = 5.04 X 2.1 22.6X 0.33=
3.25
X 0.98
0.75X 0.5=
0.75X2.3
=
3.5X 0.1 = 3.6 X
0.09=
200X 0.04= 12-1.2 = 1.3X 0.5= 0.42 X 0.6 = 3.2X 0.5= 0.21 X 0.3= 2.5-1.37=
5.5
X 11=
0.73X 2.15=
7.38X 1.6=
8.4 X 0.26= 5.5 X 17.3 =
6.7 X 5.5 = 0.5 X 0.7 = 0.8 X 3.2=
1
.5X 4 =
0.13 X 4= 8.5 X 100= 1.25 X 8=
5.7 X 5.7 =
7
4.2 X 1000= 0.45 X 0.15=
0.18X 0.3= 0.49 X 0.7 =
0.04 X 25= 53.73 －17.49=
42.4
＋7.6 =
7.8 －5.6 =
7.8 X 0.5 =
0.24 X 0.3=
0.3X 10=
5.4X 10= 3.2X 100= 3.6 X 0.1 = 1.2X 0.3= 8.5X 1.7=
9.782X 3.2 =
8.76＋0.351 =
1.58＋
2.42=
1.25 X 4=
3.9 ＋2.7 =
2.5 X 4=
O X 4.8 = 77 X 7.7 =
8
O X 4.8 = 77
X 7.7 =
9
12-3.8 = 8.1 — 0.05 = 0.24 X 0.3 = 0.2 X 0.5 = 2.5 X 3= 4.4X (5X 0.2)= 7X 1.3= 0.96X 0.06= 0.36X 0.3=
0.35X 0.7=
4X 0.8X 0.25
X 1.25= 13 ＋0.7X 0.7=
4X 0.5= 7X 2.1= 8.89+0.1= 24 X 0.25= 0.1 X 0.01= 2.4X 0.8= 9X 0.4= 10X 0. 01= 30.2-3.02= 4.3-0.25=
1-O.82=
9.6 X O.3=
2.6 X 0.01 = O X 25.4=
0.7 X 5=
0.08 X 1000=
10
4.8 X 0.4=
5.4+4.6 2= 9-3.2
=
(1.5+2.4) X 0.2= 1.7+1.3 X 0.4= 3.6 X2 3.6= 8.5 X 0.5+0.6= 7.2
X 0.8=
5.4 X 0.6= 9.5 X 0.1 = 10X 2.5= 3
5 X 0.05= 0.64 X 0.4=
2.5
X 0.5= 6.45 X 0.01= 0.36 X 0.03=
0.08 X 0.001 =
0.75 X 0.5=
0.01 X 0.2= 7.5 X
2.5=
X 0.2=
0.96 X 6=
0.1 X 6.7=
1.6 X 0.5= 11
2.5 X 4=
0.74X 0.4=
小学数学五年级上册第二单元口算题卡 7.5X 3= 3.74X 0=
0.8 X 0.6=
0.05X
0.08= 80X 1.25=
0.13X 7=
3.5X 4=
2.8X 0.5
3.5 X 200= 1.5 －0.06=
0.75 - 15= 0.4 X 0.8 =
4X 0.25= 0.36 ＋1.54 = 1.01 X 99= 420 十35= 17X 40= 100 －63=
3.2 ＋1.68=
2.8
X 0.4 =
1.92 - 0.04= 0.32 X 500=
0.08 X 1000=
0.1 X 6.7=
12
0.65＋4.35= 10 － 5.4 =
4宁 20= 3.5 X 200=
1.5 －0.06 = 0.75 宁15=
0.4X 0.8= 4 X 0.25=
1.01 X 99=
420
十35= 1235- 0.05=
0.64 - 0.4=
2.5 - 0.5=
6.45 - 0.01 = 0.36 - 0.03=
0.08 - 0.001 0.01 - 0.2=
7.5 - 2.5=
8.8 - 0.2=
0.96 - 6= 0.75 - 0.5=
0.7X 5=
1.6 X 0.5=
2.5X 4= 13
0.74 X 0.4= 3.74X 0= 0.05X 0.08= 0.13X 7= 2.8 X 0.5 - 2= 8.2+2.6= 125X 0.8= 3.4X 4X 0.25= 5.5X 2= 3－1.5X 2= 2.4X 0.5=
0.48 - 6= 6.4
－4=
7.5X 3= 0.8X 0.6= 80X 1.25= 3.5X 4= 4X 0.5= 7.16X 0.4= 2.6 - 2= 8.1 X 2.5= 9.6 - 4.8= 2X 3.1= 0.125X 8=
3.25+0.75= 0.9 - 0.1 = 0.25 X 4=
4.8 - 8= 0.5+0.5 宁0.5= 50X 0.8=
10X 0.05 =0.13 X 7 =
0.21 X 100=0.7 X 4= 0.05 X 4= 4 X0.3= 12.5X 8= 2.3 X 4= 3.25X 0= 2.6 X 3= 7.5X0.1 = 1.25 -0.25 0X 9.8 = 3 宁4 = 3.5 X 0= 1 X 0.06 =
2.6X3=7.5
X 0.1 =
0.6 - 3+3= 0.91 - 13=
14
9X 0.5 =8.2 ＋1.8= 2.4 X 5 = 3.99 X1= 8.4 - 7 =8.4 * 0.7 =
0.34 - 0.17 =30.4 * 4=
1.2 X 6 =0.72 * 0.6 =
2.6 - 1.3 =0.6 X0.3= 0*
3.65 =7.82 *1 = 0.001 * 0.1 = 1.4 * 0.7 = 3.6*0.06= 5.6 *0.9= 5.6*1.4=0.48 * 0.8 =
4.4*0.11 = 4.2 X3 = 3.2X0.4=0.3 * 0.01 = 4*0.5=
5.1 *0.17=
15
0.28 - 1.4 =0.9 -0.45 = 9.6 - 16= 1 -0.01 = 0.01 - 1 =7.5 宁1.5 = 0.81 - 9= 3 宁0.5 = 10-25 = 4.8 -0.16 = 0十3.89 = 3.52 宁1 = 37.2X 99＋
37.2=
6.4 宁4 =
1.5 宁0.3 = 1
X 0.4 - 1X 0.4=
小学数学五年级上册第三单元口算题卡
16
1.8X5=7.2 -0.9 = 25X 4-0.25 X 4=
2.2 X 6= 8.4 - 0.4 =9 -5-9-5= 2.5 X 2.8= 9-
3.2 X 0.8=
17
0.85 X 0.5+4.6=
5.9-4.3=
18
1.62X 0.4+
2.5= 2.03X2-2.4=
0.9X 0.4+0.8= 7.5-0.9= 0.48+2X 6= 1.62X 0.4= 99X 0.35 = 1.23 X 3= 7.5 X 2.5 X 4 = 2.8X 0.4= 2.5X 0.4= 5.37X 0+4.63 =
2.5X 0.5-0.2=
1.65 X 0.5+0.5=
4.2+
5.8-3.4=
0X 5.8= 0.36X 0.9= 2.5X 0.5=
0.05 X 0.8= 0.36
X 12=
1.2 X 0.4＋1.3=
1.2X 0.5 -0.4 =
1.2 X 5X 8 =
3.7 X 0.016= 19
16.9X 0.13=
10 X 0.01=
9.6 - 0.3=4- 0.5=
7 X 2.1=
8.89+0.1= 24
X 0.25=
0.1 - 0.01 =
2.4X 0.8=
2.03X 2= 9X 0.4= 30.2-
3.02=
4.3-0.25=
1-0.82=
2.6X 0.01= 0 X 25.4=
4.8X 0.4=
7.5
X 2.5 X 4 =
1.7＋0.43＋3.3 =
1.2 X 0.4＋1.3X 0.4=
5.24X 0.99=
10.65 - 0.22= 1 十 0.125=
0.125X 1=
4.39 X 10=
4.39 - 0.1 =
5.8 - 0.29=
580- 290=
20
0.7X 2= 0.7X 0.7= 0.7+0.7= 0.3X 1.21=
3X 1.21= 1.58 ＋
2.42
7.8 — 5.6 = 1.25
X 4=
7.8 X 0.5 = 3.9 ＋2.7= 0.24 - 0.3 = 2.5
X 4= 0.3 - 10= 1.25 X 8=
5.7 - 5.7 = 0 - 4.8 = 77- 7.7 = 12
— 3.8 =
8.1 — 0.05 = 8.53X 0.99= 16.73 - 2.5=。

7.3 - 0.5=
8.6 X 18+ 1.4=
2.8 X 18= 21
(8.6 +1.4) X 18= 0.1
X 0.2= 3.5 + 7.5 = 4.2
-0.1 = 99X 0.35 = 0.05
X 0.8 = 1.23 - 3= 0.36
-12=
8.5 X 100= 5.4
-10=
4.2X 1000=
2
十 100= 0.45 - 0.15 =
3.6 -0.1 =
18X 0.3=
1.2
0.3 = 0.49 - 0.7 =
8.5 -1.7 =
0.04X 25=
9.782
-3.2 = 53.73－17.49 =
8.76
+
0.351
8.6 X 18+ 1.4=
2.8 X 18= 22
42.4+7.6=
6.45
-0.01
=
0.36 - 0.03=
0.08 -0.00仁
9.5 - 0.1 =
10-2.
23
7.5 - 2.5= 0.96
- 6= 0.7
X 5=
0.1 X 6.7= 2.5 X 4=
7.5 X 3= 4.8 X 0.4= 9-3.2 X 0.8= 1.7+1.3 X 0.4= 8.5 宁 0.5+0.6=
0.01 - 0.2= 8.8 - 0.2= 0.75 - 0.5= 0.08 X 1000= 1.6 X 0.5= 0.74 X 0.4= 0X 25.4= 5.4+4.6 X 2.8= (1.5+2.4) X 0.2= 3.6 X2 3.6= 7.2 - 0.8=
0.36 - 0.03= 0.08 -0.00仁
5.4 - 0.6=
9.5 - 0.1 = 10-2.
24
2.4 - 0.8=
4.98
＋0.62=
25
35-0.05=
0.64 - 0.4=
五年级数学上册第四单元口算题
5.5 X2 = 4.8 宁 8= 5.5X 2=
4X 7.5X 2.5=
2.5 - 0.5= 0.21 X 0.3 = 5.5 -
11 =
3.5X
1= 1 - 250= 1. 8.2 X
0.7=
3.3.2 - 0.8=
5.0.8 X 0.92=
3.2X 0.5=
2.5-1.37= 0.7X 5= 0.27X 0.036=
6.64
- 3.3=
2.0.5 X 32= 9.4 - 6=
0.36 - 0.03=
26
3—1.5X 2= 2
X 3.1= 2.4X 0.5= 0.125 X 8—0.1
= 0.48 - 6= 6.4 — 4=
0.6 - 3+3= 0.91 -13=
3.25+0.75= 9.9 —0.9 - 0.1 =
17X 40 = 100 — 63=
3.2 + 1.68 = 0.5+0.
5 -0.5= 50 X 0.8= 0.99 -33=
4.5X 0.1= 6.4 宁4 = 1.3 X 7= 2 一
0.4=
2.1 X 40- 10= 2.8 X 0.4=
14—7.4=
1.92
宁 0.04 =
(2.7 — 2.7) X 3.5= 9.6 -4.8=
0.4X0.8= 4 X0.2=
1.7—0.47= 5 —0.05 =
3
0.25 = 2.5X3=
-
0.32X 500=0.65 ＋4.35 = 10—5.4= 4 -20=
3.5X200= 1.5 —0.06= 0.75 - 15= 5.5 X 2= 9.6 -
4.8= 3 —1.5X2= 2X3.1= 2.4 X 0.5=
0.125
X8—0.1 = 0.48 宁6= 6.4 —4= 0.6 -3+3= 0.91 -13= 3.25+0.75=
9.9 —0.9 - 0.1= 17 X 40=
27
100-63= 3.2 ＋1.68=
4.8 - 8= 0.5+0.5 - 0.5=
50 X 0.8= 0.99 -33=
4X 7.5 X 2.5= 4.5X0.1=
2.4 - 0.8= (2.7 - 2.7) X
3.5=
1.3 X 7= 2 - 0.4=
2.1 X 40- 10= 2.8 X 0.4=
14 -7.4=
1.9
2
- 0.04 =
0.4X0.8=0.58 ＋0.26=
1.4 X 6= 6.4 - 4= 4.98 ＋0.62 = 1.7 - 0.47= 5-0.05=
2.5 X 3=
3- 0.25 =0.32 X 500=
28
0.65 + 4.35 =10 — 5.4 = 4 宁20 = 3.5 X 200= 1.5 —0.06 =0.75 宁15 = 5.5 X 2= 4 X0.25=
0.36 ＋1.54= 1.01
X 99=
420 - 35=25 X 12= 135-0.5 =0.51 -17= 32.8 ＋19= 5.2 -1.3 = 1.6 X 0.4= 4.9 X0.7= 1宁5 = 6 -12= 0.87—
0.49=
3.5 X 0.1 =
43-0.1 =200
X 0.04=
12-1.2 = 1.3 X 0.5=
29
0.42 宁 0.6 = 6.3 宁 0.7 = 30
0.21 X 0.3 = 5.69 - 0.5 = 5.5 - 11 = 1.53 — 0.5 = 7.8 + 0.9 = 7.5 —2.5= 12-0.4 = 0.56
＋4.44= 2.9＋3.7＋2.1
=
4
X 0.25=
1.25 X 5X 8= 7.6 X 8＋
2.4X 8=
1+0.1= 0.4+0.42=
1-0.5= 0.3+0.7=
42.8-4.28= 9.7-2=
0.9-0.89= 3.5+0.5=
5-0.64= 6.3+7=
0.27 — 0.2 =
7.2 + 2.8 =
1 十0.25 X 4= 2.5 X 4 =
31
1 十 0.25 X 4=
2.5 X 4 = 32
1.2X 0.5= 4
2.9
-
6= 0.53 宁 0.5 =
0.3- 0.1 = 1 宁 0.5 =
1.4
X 11=
3.07X 100=
0.36- 0.6=
4.7+2.3= 4.5 X 2= 6.9－2.5= 7.2 X 0.8=
6 X 3.4= 0.62
－0.32=
1.4 X 0.5=
0.75X 100= 0.02X 0.5=
3.6- 0.3=
6.3 - 7=
5.6- 100= 0.75 - 0.25=
0.125X 8=
4.8 - 0.3= 0.96 - 2= 33
0.56 - 28=
0.36 宁 0.4=
0.64 - 0.8=
0.72 - 3.6=
3.6 - 24=
0.8X 1.1=
7.2+12.8= 46.7 －3.8= 12.8 - 4=
5.2
-13=
12.5 - 5=
1.64 宁 41 =
10十 20=
24 - 15= 8.65 X 10=
0.35X 0.6=
3.08 X 0.01 =
4.95X 1000=
6.9X 0.1=
0.4 X 0.5=
2.4 - 0.8=
10.8 - 9= 9.6 - 0.8=
0.108 - 2=
34
4.95 - 0.9=
9.65 - 0.1 =
0.325 X 100=
2.5X 8=
0.56 - 0.7=
0.125X 4= 3.28X 0.1=
3.9 - 0.13= 7.2X 0.1=
0.01 X 0.1= 0.25X 0.4=
1.6 - 0.8=
1 十 2.5=
1.25X 0.8= 3.2 - 0.04=
0 十 1.7=
0.22X 102=
9.6 - 0.8=
5X 0.24= 4.5 －0.05= 3.9 - 0.13 16.5 -0.5= 5X 0.12= 24 X 0.5= 4.8 X 0.5=
2.8
＋4.2=
35
0.84 - 2.1 =
3.8 + 5.6 =
练习一
1 十 0.01 = 2.
7X 0.3= 0.96 X 10= 8.4 - 0.1 = 1.9 - 19= 0.15X 0.4= 0.42X 1.01= 0.75X 8= 0 十 1.69= 0.6 - 10= 1 十 0.25= 0X 3.7= 2.08 - 0.1 = 0.4X 0.5= 0.05X 0.6= 1.7 X 3= 2.2X 3= 7.6 - 4= 1.2 X 0.3=
9.9 - 1.1 =
0.25 - 5=
0.25 - 0.5=
36
0.15 X 0.4= 0.05 X 6=
二 看谁算的快 2x+8=16
x 宁=10
x+7x=8
9x-3x=6
练习二
0.63 - 7= 7.2 - 3.6= 0.81 - 0.9= 4.3X 0= 0.3X 0.16= 6- 12= 0.88 - 0.4= 12-20= 0.81 - 0.3= 1 十 0.25=
7X 0.01=
0.05X 6=
0.02 X 0.03= 0.81 - 3= 37
表示
练习三
1.06 X 5=
0.2 X 0.35= 2.7 X 0.2= 0.45 X 0.2=
1.5 X 6= 0.05 X 0.8=
2.4 X 0.2=
0.4 X 6=
1、
2、
2.13 X 2= 填空
平行四边形的面积公式是: 三角形的面积公式是:
0.25 X 4=
表示
0.02 X 0.03= 0.81 - 3=
快速计算下列各题
38
2.1 - 2= 0.77 -35= 0.3 X 10.1 =
3.6 -0.3= 2.08 - 0.1 = 1.06 X 5= 7X 0.05= 7.2X 0.9=
0.45X 2= 2.51
X104=
0 十1.69= 0.4X 0.5=
3- 1.2= 0.51 - 0.3=
8.4 - 7= 8.08-8= 4.05X1000= 0.92 - 4= 5x+x=9 x-8=6x
6x+6=12 5x-3x=4
39
4+5x=9 7x-9=8
根据平行四边形公式填空
五年级数学上册第六单元口算题
练习一
2.4 X 0.2= 0.96 X 10= 8.4 - 0.1= 1.5 X 0.3=
2.5 5X 0.4= 0.15 X 0.4=
0.42
X
1.01 =40
41
0.75 X 8= 1 十 0.2= 0.6 - 10= 1 十 0.25= 3.6 - 0.3= 2.08 - 0.1 =
1.06X 5=
2.51 X 104= 0 十 1.69= 0.4X 0.5=
1.7 X 3=
2.2X 3= 7.6 - 4= 0.85 - 0.5= 0.25 - 0.5= 0X
3.7= 1.2 X 0.3= 9.9 - 1.1 = 0.25 - 5= 1.5 X 0.6= 0.95 - 9.5=
6.13 - 100= 练习二
1 十 0.01 =
0.63 - 9=
0.54 - 0.2=
0.7 X0.8=
0.2X 0.35=
2.7X 0.2=
42
0.05 X 0.6= 0.70 - 0.1 = 0.48 - 48=
1 十 0.01 = 7.
2 - 3.6= 8.4 - 0.4=
0.8X 1.25= 0.3X 0.16= 0.12 - 20=
0.02X 0.03= 0 十 0.56= 4- 0.25= 0.24 - 0.6=
0.84 - 0.21 = 0.63 - 7= 0.75X 4= 0.81 - 0.9= 4.3X 0= 1 十 0.25=
23.7X 0.01= 0.04X 20=
0.81 - 3=
43
0.54 - 0.2= 0.7 X0.8=
0.2X 0.35=
2.7X 0.2=
44
0.28 - 0.7=
0.16 - 0.4= 8.2 - 0.01 =
0.75 - 0.3=
0.4 X 0.5=
0.45X
0.2= 0.81 - 0.3=
10 十 0.5=
1.5 X 6=
0.05X 0.8= 0.25 - 5=
4-0.5=
2.7X 0.3=
0.65X 0.6= 0.73X 0.4=
0.05X 6=
0.4X 6=
2.13X 2=
0.25X 4=
4.5
X 6=
练习三
1.6X 0.8=
7.5 - 1.5=
7.2 - 0.6=
3.9 - 3.9=
8.4 - 7=
45
2.4 - 30=
0.3X 10.1= 5-0.25= 0.7X 1.4= 7X 0.05= 0.45X 2=
8.1 - 0.09= 1.2 X 0.5=
60- 0.5= 19X 1.6= 0.51 - 0.3=
2.1 - 2= 0.77 - 35=
3.6 - 1.8= 8.21 - 0.1 = 0.36 X 0.2= 7.2 X 0.9=
3- 1.2= 1 十 0.125= 1.5 X 60= 6.1 X 0.4= 2.43X 101=
6- 12= 0.88 - 0.4=
7.8 宁0.6= 8.08 宁8= 4.05 X 1000= 0.25 X 96=
五年级数学上册第七单元口算题
练习一
0 十1.5= 6.3 - 2.1 = 4.4X0.1= 4.2 X 0.8= 3.1 X 0.7= 0.5X 0.2= 0.73X 0.4= 1.5 - 0.15= 4.4X0.1= 0.7X1=
46
6- 12= 0.88 - 0.4= 7.4 - 0.5= 0.72 - 8= 0.65X 0.6= 4.5 - 0.3=
47
1.34 X 2= 1 十 0.01 =
48
3.4X 0.6= 9.6 - 1.6= 7.2X 0.01= 11.2
-0.2=
0.15X 0.4= 0.05X 6= 4.2 - 21 =
6.28
♦
3.14=
1.25 -
2.5=
二 解易方程
4/5x=20
2x-6=12
3x-7=26 9x-x=16
7x+7=14 3x+7=28
24x+x=50 6/7x-8=4 1. 一个数乘 3, 减去 5, 除以 4, 再加上 8 减去 2, 除 49
练习二
0.45 - 0.5= 0.88 - 0.4= 0.03 X 0.4= 0.7 - 100= 6.3 - 21 = 8.4 - 0.21 = 1.5 X 0.3= 0.24 - 0.6= 0.84 - 0.21 =
二、填空 6- 12= 4.9 - 0.01 = 12.8 - 0.4= 9.4 - 0.2= 1.34X 2= 1.2 - 0.3= 0.15 X 0.4= 0.48 - 48=
24x+x=50 6/7x-8=4
2.55X 0.4=
1. 一个数乘3, 减去5, 除以4, 再加上8 减去2, 除
50。