100 preguntas de cálculo sencillas para cuarto grado de primaria
(306)x12
=300×12+6×12
=36072
=3672
25x( 4+8)
=25×4+25×8
=10200
=300
84x101
=84×1084×1
=84084
=8484
504x25
=500× 25+4×25
=1250100
=12600
=300×12+6×12
=36072
=3672
25x( 4+8)
=25×4+25×8
=10200
=300
84x101
=84×1084×1
=84084
=8484
504x25
=500× 25+4×25
=1250100
=12600