Question

Calculati in 2 moduri :17 x 2 +17 x 8 (22+33+44):11+20 ;(222+333+444+555):111; 325 x 15 +325 x 27 - 325 x 2; (2+3+4) x 7+ (4+5+6) x 7;

Answer 1

Răspuns:

Explicație pas cu pas:

17 x 2 +17 x 8 = 34 + 136 = 170

17 x 2 +17 x 8 = 17 x (2 + 8) = 17 x 10 = 170

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(22+33+44):11+20 = 99 : 11 + 20 = 9 + 20 = 29

(22+33+44):11+20 = 2 + 3 + 4 + 20 = 29

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(222+333+444+555):111 = 1554 : 111 = 14

(222+333+444+555):111 = 2 + 3 + 4 + 5 = 14

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325 x 15 +325 x 27 - 325 x 2 = 4875 + 8775 - 650 = 13000

325 x 15 +325 x 27 - 325 x 2 = 325 x (15 + 27 - 2) = 325 x 40 = 13000

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(2+3+4) x 7+ (4+5+6) x 7 = 9 x 7 + 15 x 7 = 63 + 105 = 168

(2+3+4) x 7+ (4+5+6) x 7 = 7 x (2 + 3 + 4 + 4 + 5 + 6) = 7 x 24 = 168