Question

Calculeaza dupa model:MODEL:(3×6)+(3×2)=3×(6+2)=3×8=24:....a)(2×3)+(2×5)=;(5×4)+(5×6)=;(7×2)+(7×4)=;(8×3)+(8×5)=;...b)(9×7)-(9×4)=;(7×5)-(7×3)=;(6×9)-(6×4)=;(8×7)-(8×4)=;

Answer 1

a)(2×3)+(2×5)=2x(3+5)=2x8=16
(5×4)+(5×6)=5x(4+6)=5x10=50
(7×2)+(7×4)=7x(2+4)=7x6=42
(8×3)+(8×5)=8x(3+5)=8x8=64
b)(9×7)-(9×4)=9x(7-4)=9x3=27
(7×5)-(7×3)=7x(5-3)=7x2=14
(6×9)-(6×4)=6x(9-4)=6x5=30
(8×7)-(8×4)=8x(7-4)=8x3=24;

Answer 2

(2*3)+(2*5)=2*(3+5)=2*8=16;(5*4)+(5*6)=5*(4+6)=5*10=50;(7*2)+(7*4)=7*(2+4)=7*6=42;(8*3)+(8*5)=8*(3+5)=8*8=64;(9*7)-(9*4)=9*(7-4)=9*3=27;(7*5)-(7*3)=7*(5-3)=7*2=14;(6*9)-(6*4)=6*(9-4)=6*5=30;(8*7-(8*4)=8*(7-4)=8*3=24