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entrenamiento en calculo mental
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CALCULO MENTAL X20
125 + 7=
305 x 6=
63 + 3=
9 - 8=1
37 – 4 =
246 x 4=
21 + 1 =
549 x 6=
116 + 5=
83 + 5=
69 - 3=
29 – 7 =
03 x 0 =
355 x 7=
413 – 9 =
138 + 5 =
817 – 9 =
22 x 1 =
183 x 6 =
306 x 5 =
