Question

Calculează în două moduri a 231 plus 121 ori 13 c 181+115×24e24 ori 512 minus 318 b 451 plus 135 ori 16 D 17 ori 418 minus 119 f)28×(454-243= pliz repede​

Answer 1

Răspuns:

a) (231+121)x13=231x13 + 121x 13=3003+1573=4576

(231+121)x13=352x13=4576

b) (451+135)x16= 451x16 + 135x16=7216+2160=9376

(451+135)x16= 586x16=9376

c) (181+115)x24= 181x24 + 115x24= 4344+2760=7104

(181+115)x24=296x24=7104

d) 17x(418-119)= 17x418-17x119=7106-2023=5083

17x(418-119)=17x299=5083

e) 24x (512-318)=24x512-24x318=12288-7632=4656

24x(512-318)=24x194=4656

f) 28x (454-243)=28x454-28x243=12712-6804=5908

28x(454-243)=28x211=5908