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a fost răspuns

Efectuati grupand convenabil factorii: c)38×4×10×5; d)6×39×5; e)4×63×25; f) 15×93×2; g)35×54×4; h)75×77×2;

Răspuns :

Cocirmariadenis

c )   38 × 4 × 10 × 5 = 7 600

= ( 38 × 10 ) × ( 4 × 5 ) =

= 380 × 20 =

= 7 600

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d )   6 × 39 × 5 = 39 × ( 6 × 5 ) = 39 × 30 = 1 170

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e)   4 × 63 × 25 = 63 × ( 4 × 25 ) = 63 × 100 = 6 300

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f)   15 × 93 × 2 = 93 × ( 15 × 2 ) = 93 × 30 = 2 790

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g)   35 × 54 × 4 = 54 × ( 35 × 4 ) = 54 × 140 = 7 560

daca era 25 in loc de 35

25 × 54 × 4 = 54 × ( 25 × 4 ) = 54 × 100 = 5 400

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h)   75 × 77 × 2 = 77 × ( 75 × 2 ) = 77 × 150 = 11 550

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