4. (40 x 39) × (-12) 5. (82×73) × (-15) = …x (…X…) = …. = … X (…X…) = … 4. ( 40 x 39 ) × ( -12 ) 5. ( 82×73 ) × ( -15 ) = … x ( … X … ) = …. = … X ( … X … ) = …​

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4. (40 x 39) × (-12) 5. (82×73) × (-15) = …x (…X…) = …. = … X (…X…) = … 4. ( 40 x 39 ) × ( -12 ) 5. ( 82×73 ) × ( -15 ) = … x ( … X … ) = …. = … X ( … X … ) = …​

Penjelasan dengan langkah-langkah:

Nomor 4

= (40 times 39) times ( - 12)

= 40 times(39 times ( - 12))

= 40 times ( - 468)

= - 18.720

:

Nomor 5

= (82 times 73) times ( - 15)

= 82 times (73 times ( - 15))

= 82 times ( - 1.095)

= - 89.790