Question

Calculați, după modelul prezentat:

12 ⋅ 99 = 12 ⋅ (100 – 1) = 12 ⋅ 100 – 12 ⋅ 1 = 1 200 – 12 = 1 188;

a) 35 ⋅ 99;
d) 31 ⋅ 98;

b) 27 ⋅ 101;
e) 4 ⋅ 999;

c) 15 ⋅ 102;
f) 5 ⋅ 1 004;

​pls rapidd sunt in ora dau coroana

Answer 1

Răspuns:

27×101=27×(100+1)=27×100+27×1=2700+27= 2.727

la 2 :

12×102=12×(100+2)=12×100+12×2=1200+24

=1224