Question

Calculeaza produsele ,folosind tehnici de calcul rapid ,dupa model.
exemplu;
57 x 11 = 57 x ( 10 + 1 ) =57 x 10 + 57 x 1 = 570 + 57 = 627

A) 34 X 11 =
89 X 11 =
B) 145 X 11 =
274 X 11 =
C ) 105 X 11 =
217 X 11 =
D ) 365 X 11 =
480 X 11 =

Answer 1

34×(10+1)=34×10+34×1=340+34=374 89×11=89×(10+1)=89×10+89×1=890+89=979 b)145×11=145×(10+1)=145×10+145×1=1450+145=1595 274×11=274×(10+1)=274×10+274×1=2740+274=3014 C)105×11=105×(10+1)=105×10+105×1=1050+105=1155 217×11=217×(10+1)=217×10+217×1=2170+217=2387 d)365×11=365×(10+1)=365×10+365×1=3650+365=4015 480×11=480×(10+1)=480×10+480×1=4800+480=5280