Question

Va rog îmi trebuie rapid rezolvarea la acest test o predau maine​

Answer 1

Răspuns:

Explicație pas cu pas:

1) a)   29 × 55 + 29 × 45 = 29 × ( 55 + 45 ) = 29 × 100 = 2 900

b)   40 × 87 - 38 × 40 = 40 × ( 87 - 38 ) = 40 × 49 = 1960

c)  368 × 999 + 368 = 368 × ( 999 + 1 ) = 368 × 1000 = 368 000

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2)

17 × 213 + 17 × 37 - 17 × 50 =

= 17 × ( 213 + 37 - 50 ) =

= 17 × ( 250 - 50 ) =

= 17 × 200 =

= 3 400

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b)  146 × 85 - 85 + 85 × 355 = 42 500

= 85 × ( 146 - 1 + 355 ) =

= 85 × ( 145 + 355 ) =

= 85 × 500 =

= 42 500

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3) n + p = 4

m × n + m × p = 392

m × ( n + p ) = 392

m × 4 = 392

m = 392 : 4

m = 98