Page 1 CALCULO MENTAL X20Page 2 125 + 7=Page 3 305 x 6=Page 4 63 + 3=Page 5 9 - 8=1Page 6 37 – 4 =Page 7 246 x 4=Page 8 21 + 1 =Page 9 549 x 6=Page 10 116 + 5=Page 11 83 + 5=Page 12 69 - 3=Page 13 29 – 7 =Page 14 03 x 0 =Page 15 355 x 7=Page 16 413 – 9 =Page 17 138 + 5 =Page 18 817 – 9 =Page 19 22 x 1 =Page 20 183 x 6 =Page 21 306 x 5 =