Question

Calculează în două moduri
(5+4)×9=
(7+2)×8=
(8-3)×7=
(9-5)×6=​

Answer 1

(5+4)x9=9x9=81

(5+4)x9=5x9+4x9=45+36=81

(7+2)x8=9x8=72

7x8+2x8=56+16=72

(8-3)x7=5x7=35

(8-3)x7=8x7-3x7=56-21=35

(9-5)x6=4x6=24

(9-5)x6=9x6-5x6=54-30=24

Answer 2

Răspuns:

(5 + 4) x9 = 9x9 = 81

(5 + 4) x9 = 5x9 + 4x9 = 45 + 36 = 81

(7 + 2) x8 = 9x8 = 72

7x8 + 2x8 = 56 + 16 = 72

(8-3) x7 = 5x7 = 35

(8-3) x7 = 8x7-3x7 = 56-21 = 35

(9-5) x6 = 4x6 = 24

(9-5) x6 = 9x6-5x6 = 54-30 = 24

Explicație pas cu pas: