Upload
luis-gutierrez
View
2.072
Download
5
Embed Size (px)
Citation preview
Calculo mental
Colegio Marista San JoséLuis Gutiérrez Martín - [email protected]
Multiplicación por la unidadseguida de cerosAdivinar número
52 x __ = 5 200
455 x_=45 500
10 x __ = 1 000
85 x __ = 85 000
95 x __ = 9 500
99 x __ = 9 900
481 x__= 4 810
11 x __ = 11 000
33 x __ = 3300
10 x __ = 100
77 x __ = 7 700
80 x __ = 800
263 x __=26300
49 x __ = 4 900
39 x __ = 390
89 x __ = 8 900
15 x __ = 150
43 x __ = 430
311 x_ =31 100
1 x __ = 1 000
505 x__=50 500
45 x _= 450
100 x __= 1 000
38 x __ = 38 000
52 x __ = 5 200
3 x __ = 300
46 x __ = 4 600
11 x __ = 11 000