Question

Calculeaza rapid folosind proprietatile inmultirii ; model 6x45=6x5x9=30x9=270 a) 8x19 8x54 5x69 model 32 x75=4x8x3x25=8(x3)x(4x25)=24x100=2400 b ) 36x75; 28x75 ; 24x75

Answer 1

a) 8×54=8×6×9=48×9=432 ; 5×69=5×3×13=15×13=195 ; b) 36×75=6×6×3×25=(6×3)×(6×25)=18×150=2700 ; 28×75=4×7×3×25=(3×7)×(4×25)=21×100=2100 ; 24×75=2×12×3×25=(12×3)×(2×25)=36×50=1800 Sper că te-am ajutat!