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a. 13 17
b. 8 8
c. 8 8
d. 85 169
se cumple la propiedad distributiva en el c y b
4)
a. 4489 - 25 + 45 = 4509
b. (29 - 14 + 49) ÷ 2 + 2 =
64 ÷ 2 + 2 =
32 + 2 = 34
c. 6 × 11 + 21 × 2 =
66 + 42 = 108
d. 54 + 7 - 16 = 45
e. 117 ÷ 9 + 31 =
13 + 31 = 44
f. (12 + 143 ) ÷ (9 - 4)
155 ÷ 5 = 31