ADICIÓN DE ENTEROS
700-300=
400
225-50=
175
12X30-60=
300
110.8-2.8=
108
2/3X3/5=
2/5
750-380=
370
320-35=
285
18X45-50
760
453.6-48.7=
404.9
3/4+4/16=
1 ó 4/4 ó 16/16
248+76=
324
647-49=
598
8X64-24=
488
856-98=
758
1/11+1/33=
4/33
738+979=
1717
923-684=
239
32+25X4=
132
842.3-27.3=
815
2/7+3/17=
55/119
999+675=
1674
814-625=
189
225-9X7=
162
74.31-28.96=
45.35
1/2+3/4+2/8=
6/4=1 1/2 ó 5/2