calculo mental 5º
DESCRIPTION
SECUENCIA FICHASTRANSCRIPT
1
2
5800 + 300 = 6100
8 + 3 = 11
3
4800 - 600 =4200
8 - 6 = 2
4
64 + 11 = 75
64 + (10+1) = 75
5
43 + 9 = 5243 + (+10-1) = 52
6
43 + 19 = 6243 + (+20-1) = 62
7
16 - 11 = 5
16 - (-10+1) = 5
8
46 - 21 = 25
76 - 31 = 45
9
16 - 9 = 716 - (-10+1) = 7
316 - 9 = 307
10
43 -1 9 = 24
83 -29 = 54
11
856 + 101 = 957
856 +100 +1 = 957
12
856 - 201 = 1057
856 - 301 = 1157
13
856 + 99 = 955
856 +(+100-1) = 955
14
856 + 199 =1055
456 + 299 = 755
15
856 + 101 = 957
856 +100 +1 = 957
16
856 + 201 = 1057
17
246 - 99 = 147246 - (100+1) = 147
18
246 - 199 = 47
646 - 199 = 447
19
27 x 10 = 270
46 x 100 = 4600
65 x 1000 = 65000
20
2 x 60 = 120
6 x 200 = 1200
5 x 3000 = 15000
21
200 10 = 202 1 = 1
3000 10 = 300
22
200 100 = 2
2 1 = 1
3000 1000 = 3
23
60 20 = 3
400 200 = 216000 8000 = 2
24
198 + 37+2 =237
198 + 2 =237
200 + 37 =237
25
170 + 67+30 =267
170 + 30 =200
200 + 67 =267
26
40 x 600 =24000
4 x 6 =24
27
5 x 7 x 8 = 280
5 x 8 =40
40 x 7 =280
28
4,7 x 10 =47
4,7 x 100 =470
4,7 x 1000 =4700
29
234 10 = 23,4
476 100 = 4,76
6325 1000 = 6,325
30
20 2 = 10
2 1 = 1
246 2= 123
31
74 2 = 37
70 2 = 354 2= 235 + 2 = 37
32
840 20 = 42
840 10 = 8484 2 = 42
33
46 x 5 =23046 x 10 =460460 2 = 230
34
46 x 50 =230046 x 100 =4600460 2 = 2300
35
310 5 = 62310 10 =3131 x 2 = 62
36
1800 50 = 361800 100 =1818 x 2 = 36
37
1/4 de 12 =3
12 4 =3
38
2/3 de 12 = 12
24 2 = 122 x 12 = 24
39
10% de 85 = 12
85 10 = 8,5
40
3% de 9 = 0,27
3 x 9 = 2727 100 = 0,27