Question

+
3. Calculează după model:
Model: (3 x 6) + (3 x 2) = 3 x (6 + 2)
= 3x8
= 24
a) (2 x 3) + (2 x 5) =
(5 x 4) + (5 x 6) =
(7 X 2) + (7 x 4) =
(8 x 3) + (8 x 5) =
b) (9x 7) - (9 x 4) =
(7 x 5) - (7 x 3) =
(6 x 9) - (6 x 4) =
(8 x 7) - (8 x 4) =

Answer 1

Răspuns:

a) (2 x 3) + (2 x 5)=2×(3+5)=2×8= 16

(5 x 4) + (5 x 6) =5×(4+6)=5×10=50

(7 X 2) + (7 x 4) =7×(2+4)=7×6=42

(8 x 3) + (8 x 5) =8×(3+5)=8×8=64

b) (9x 7) - (9 x 4) =9×(7-4)=9×3=27

(7 x 5) - (7 x 3) =7×(5-3)=7×2=14

(6 x 9) - (6 x 4) =6×(9-4)=6×5=30

(8 x 7) - (8 x 4) =8×(7-4)=8×3=24

Explicație pas cu pas:

PLS COROANA