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a fost răspuns

Efectuează în doua moduri
5×(5+2)
8×(6-3)
(2+4)×9
(5-3)×6
(3+2+4)×10
(5+1+2)×9
10×(4+3-2)

Răspuns :

HawkEyed

5×(5+2)  = 5 x 7 = 35

            = 5 x 5 + 5 x 2 = 25 + 10 = 35

8×(6-3)  = 8 x 3 = 24

            = 8 x 6 - 8 x 3 = 48 - 24 = 24

(2+4)×9  = 6 x 9 = 54

            = 2 x 9 + 4 x 9 = 18 + 36 = 54

(5-3)×6  = 2 x 6 = 12

            = 5 x 6 - 3 x 6 = 30 - 18 = 12

(3+2+4)×10  = 9 x 10 = 90

                  = 3 x 10 + 2 x 10 + 4 x 10 = 30 + 20 + 40 = 50 + 40 = 90

(5+1+2)×9  = 8 x 9 = 72

                 = 5 x 9 + 1 x 9 + 2 x 9 = 45 + 9 + 18 = 54 + 18 = 72

10×(4+3-2) = 10 x 5 = 50

                  = 10 x 4 + 10 x 3 - 10 x 2 = 40 + 30 - 20 = 70 - 20 = 50

Marcela16
5×( 5+2 ) = 5 × 7 = 35
5×2 + 5 × 5 = 10 +25 = 35

8×( 6-3 ) = 8 × 3 = 24
8×6- 8 ×3 = 48 - 24 = 24

( 2+4) × 9= 6 ×9= 54
2×9+4×9 = 18 +36 = 54

( 3 + 2 + 4 ) × 10 = 9 ×10 = 90
3×10 +2×10 + 4 ×10 = 90

( 5 + 1 + 2 ) × 9 = 8 × 9 = 72
5×9 + 1×9 + 2 × 9 = 72

10 × ( 4 + 3 - 2 ) = 10 × 5 = 50
10 ×4 + 10 ×3 - 10 ×2 = 50

( 5-3 ) × 6 = 2 × 6 = 12
5 × 6 - 3 × 6 = 12

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