a. 17,86 + 3,78 + 8,14 b. 56,69 – 23,41 – 18,59
= (17,86 + 8,14) + 3,78 = 56,69 – (23,41 + 18,59)
= 26 + 3,78 = 29,78 = 56,69 – 42 = 14,69
a. 17,86 + 3,78 + 8,14 b. 56,69 – 23,41 – 18,59
= (17,86 + 8,14) + 3,78 = 56,69 – (23,41 + 18,59)
= 26 + 3,78 = 29,78 = 56,69 – 42 = 14,69