Question

2 Calculează în două moduri. (285+107) x 1 000 = 1. II. 100 x (165+87) = 1. II. (9 872-8 965) x 10 = 1. 11. 1000 x (379-298) = 1. 11.
ma ajutati?​

Answer 1

Salutare!

I. (285+107)×1000= 392×1000=392000

II. (285+107)×1000=285×1000+107×1000=285000+107000=329000

I.100×(165+87)= 100×252=25200

II.100×(165+87)=100×165+100×87=16500+8700=25200

I.(9872-8965)×10= 907×10=9070

II.(9872-8965)×10=9872×10-8965×10=98720-89650=9070

I.1000×(379-298)=1000×81=81000

II.1000×(379-298)=1000×379-1000×298=379000-298000=81000