Question

varog matematica va mulțumesc​

Answer 1

Explicație pas cu pas:

a) 420 ×22 = 400 ×22 + 20×22

=4 ×2200 + 2×220 =

=8800 +440 =9240

b) 123× 23 = 100 ×23 + 20×23 + 3×23=

=2300 +2 ×230 +69=

=2300 +460 +69=

=2300 +529=

=2829

c) 204 ×12= 200× 12 + 4 ×12=

= 2× 1200 +4 ×10 × 4×2=

=2400 +40+8=

=2448

d) 401 ×21 = 400× 21 + 1×21=

=4 ×2100 +21 =

=8400 +21=

= 8421

e) 320× 32= 300 ×32 + 20 ×32=

= 3×3200 + 2×320=

=9600 + 640=

=10240

Answer 2

Răspuns:

420x. 204x. 320x

22. 12. 32

÷÷÷÷÷÷ ÷÷÷÷÷÷÷ ÷÷÷÷÷÷÷

840. 408. 640

840. 204. 960

÷÷÷÷÷÷÷ ÷÷÷÷÷÷÷÷÷ ÷÷÷÷÷÷÷÷÷

9240. 2448. 10240

Acum ai exemple.Restul le calculezi tu.Trebuie sa inveti lucrurile de baza☝