Matematică, întrebare adresată de mariapufarina, 8 ani în urmă

Calculează produsele în două moduri:
563 X (2 + 3) =
421 x (9-3)=
(276 + 456) x 7 =
5x (643-238) =
(321 +247) x 9 =
(213-114) x 1 000 =
REPEDE PLSSSS​

Răspunsuri la întrebare

Răspuns de gutagabriellucian
117

Răspuns:

mod 1

564×(2+3)= 564×5=2820

421×(9-3)=421×6=2526

(276+456)×7=732×7=5124

5×(643-328)=5×315=1575

(321+247)×9=568×9=5112

(213-114)×1000=99×1000=99000

mod 2

564×2+564×3=1128+1692=2820

421×9-421×3=3789-1263=2526

276×7+456×7=1932+3192=5124

5×643-5×328=3215-1640=1575

321×9+247×9=2889+2223=5112

213×1000-114×1000=213000-114000

Explicație pas cu pas:

am incercat cat mei repede

coronita?


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