500 preguntas urgentes de aritmética oral para alumnos de cuarto de primaria
640÷80=
15×5=
23×3=
12×2×5=
480÷80=
16×5=
27×3=
90÷15=
48÷4 =
640÷16=
39÷3=
24×20=
32×3=
48÷16=
12×8=
27×3=
56÷14=
24÷8=
14×2=
83-45=
560÷80=
96÷24=
40÷20=
40×30=
37+26=
76-39=
605+59=
30×23=
12×8=
27+32=
48+27=
4500×20=
73+15 =
120×600 =
200×360=
6800×400= p>
28270=
4×2500=
6000÷40=
5×1280=
310 -70=
400× 14=
47180=
1000÷25=
160×600=
20×420=
290×300=
8100÷300=
7600÷200=
7600÷ 400=
68270=
980÷14=
4200÷30=
6×1300=
1300×50=
200× 48=
930-660=
53280=
9200÷400 =
840÷21=
180×500=
8000÷500 =
1900÷20=
200×160=
8700÷300=
300×330=
3×1400=
7000÷14=
600÷12=
9600÷80=
140×300=
8800÷40=
9600÷800=
750-290= p>
5×490=
760×20=
7500÷500=
370×200=
650 ÷13=
8600-4200=
240×4=
640÷80=
15×10=
12×11=
160×30=
220×40= p>
104×5=
4500÷ 50=
120×2=
90÷30=
270 ÷30=
270×30=
84÷2
1=
76÷9=
66÷7=
100-54=
123+15=
360÷4=
55÷5=
32×6= 7000÷70=
200÷40=
180 ÷30=
240÷40=
35×2=
140×7=
13×6=
280×3=
350×2=
50×11=
250×6=
7200 900 =
410-201=
125×8=
48×20=
6600÷600=
390 140=
11×80=
24×50=
3600÷400= 4000÷50=
530 -70=
420-90=
9600÷30=
7×700=
203 98= p>
1800÷300=
240 570=
4800÷400=
370 580=
580-490 =
910-370=
25×8=
270-190=
36×2=
75÷25=
330÷11=
6×800=
5400÷9=
420÷60= 9×800=
3×330=
300×7=
9×500=
390÷13= p>
6300÷700=
5600÷700=
4800÷12=
3500÷7=
370 +560=
52490=
450-90=
8330=
70×700=
7000÷70=
4000÷80=
2400÷200=
420-90=
17320= p>
1000 -51= 520-260=
910-190=
35×200=
22×200=
8800÷400=
9300÷300=
6×300=
1800÷200=
9300÷30 =
280÷4
0=
304+199=
390÷26=
1250÷50=
21×40=
6600÷220=
760-198=
660-220=
5000÷50=
100×91=
753-299=
7000÷70=
200÷40=
180÷30=
240÷40=
35×2=
140×7=
13×6=
280×3= p>
350×2=
50×11=
250×6=
7200 900=
410- 201=
125×8=
48×20=
6600÷600=
390 140=
11×80=
24×50=
3600÷400=
4000÷50=
530-70=
420-90=
9600÷30=
7×700=
203 98=
1800÷300=
240 570=
4800÷400=
370 580=
580-490=
910-370=
25×8=
270-190=
36×2=
75÷25 =
330÷11=
6×800=
5400÷9=
420÷60=
9×800=
3×330=
300×7=
9×500=
390÷13=
6300÷700=
5600÷700=
4800÷12=
3500÷7=
37560=
52490=
450-90=
8330=
70×700=
7000÷70=
4000÷80=
2400÷200=
420-90=
17320=
520-260=
910-190=
35×200=
22
×200=
8800÷400=
9300÷300=
6×300=
1800÷200=
9300÷30=
280÷40=
304+199=
390÷26=
1250÷50=
21×40=
6600÷220=
760-198=
660-220=
5000÷50=
100×91=
753-299=
25 -15 -80 = 10 -80 = -70
26 -6 -64 = 20 -64 = -44
27 3 -48 = 30 -48 = -18
28 12 -32 = 40 -32 = 8
29 21 -16 = 50 -16 = 34
30 30 0 = 60 0 = 60
31 39 16 = 70 16 = 86
>
32 48 32 = 80 32 = 112
33 57 48 = 90 48 = 138
34 66 64 = 100 64 = 164
35 75 80 = 110 80 = 190
36 84 96 = 120 96 = 216
37 93 112 = 130 112 = 242
38 102 128 = 140 128 = 268
39 111 144 = 150 144 = 294
40 -30 -140 = 10 -140 = -130
41 -21 -124 = 20 -124 = -104
42 -12 -108 = 30 -108 = -78
43 -3 -92 = 40 -92 = -52
44 6 -76 = 50 -76 = -26
45 15 -60 = 60 -60 = 0
46 24 -44 = 70 -44 = 26
47 33 -28 = 80 -28 = 52
48 42 -12 = 90 -12 = 78
49 51 4 = 100 4 = 104 p>
50 60 20 = 110 20 = 130
51 69 36 = 120 36 = 156
52 78 52 = 130 52 = 182
53 87 68 = 140 68 = 208
54 96 84 = 150 84 = 234
55 -
45 -200 = 10 -200 = -190
56 -36 -184 = 20 -184 = -164
57 -27 -168 = 30 -168 = -138 p>
p>
58 -18 -152 = 40 -152 = -112
59 -9 -136 = 50 -136 = -86
60 0 -120 = 60 - 120 = -60
61 9 -104 = 70 -104 = -34
62 18 -88 = 80 -88 = -8
63 27 - 72 = 90 -72 = 18
64 36 -56 = 100 -56 = 44
65 45 -40 = 110 -40 = 70
66 54 -24 = 120 -24 = 96
67 63 -8 = 130 -8 = 122
68 72 8 = 140 8 = 148
69 81 24 = 150 24 = 174
70 -60 -260 = 10 -260 = -250
71 -51 -244 = 20 -244 = -224 p>
72 -42 -228 = 30 -228 = -198
73 -33 -212 = 40 -212 = -172
74 -24 -196 = 50 -196 = -146
11 3^3-5
12 4^2-34
13 3,25-315
14 7^3 445
15 12 5268.32-2569
16 123 456-52*8
17 45 6325
18 1/ 2 1/3 1 /4
19 789 456-78
20 45 54-36
3.5×2= 4.8÷1.2= 8-7.5= 1.4×0.5= 1 - =
10.5-3.5= 0.6 2.5= 15×0.6= 1÷0.4= =
4÷20= 1.25×0.8= 0.32×10 = 2,5-2,5×0,4=
210÷3= 40÷5= 160÷40= 350÷70=
13×3= 12×6= 23×4= 720 ÷90=
24×3= 13×5= 24÷2= 96÷6=
78÷2= 78÷3= 48÷4= 48÷3=
28×2= 3×26= 16×4= 48×2=
3×19= 12×5= 27×3= 4×24=
24-8= 67 -59= 45-28= 54-17=
12×3= 15×6= 14×4= 37×2=
36÷ 3= 90÷6= 56 ÷4= 74÷2=
130-50= 53-26= 100-37= 95-57=
36÷12= 90÷ 15= 56÷14= 74 ÷37=
15×5= 48÷
16= 76÷2= 90÷45=
12×7= 5×14= 64÷4= 6×16=
91÷7= 84÷6= 60÷ 12= 96÷24=
320÷40= 450÷90= 560÷70= 14×7=
770-70= 51+49= 83-18= 890-35=
4×24= 32÷2= 96÷8= 85÷5=
64÷16= 70÷35= 25×4= 6×15=
48+52= 70÷14= 5×14= 12×30=
73+27= 40×20= 80÷20= 14+86=
480÷80 = 6040= 150 ÷50= 630÷70=
36÷2= 550÷5= 15×6= 300÷60=
16×3= 70÷5 = 2×45= 13 ×4=
54 87 13= 39 144 61= 567 299= 327-198=
27×4×5= 18×35= 32× 25= 15×28× 2=
231 409= 13.2 12.8= 1.82-0.63= 3.22-2.1= 5.4 3.2= 4.56-2.31= 1.6 4.9= 78-8= 29-9= 43 57= 19,3-0,003= 2,467 2,456 = 1,25-45= 1,23 21,3= 3,21-2,13= 2 3,1= 12,56-0,52= 7,6-2,4= 7,89 3,147= 123 456= 147-123= 1,45 7,89= 3,45-1,56= 12 45 = 54 87= 39-13= 12 89=
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