-10×(21×(-4))= ( × )=

-10×(21×(-4))= ( × )=

Penyelesaian :

= -10 × (21 × (-4))

= -10 × (-84)

= 840 ✔

$colorbox{black}{orange{boxed{colorbox{black}{red{cal{AnswerBy::: rahmawatiyulia850}}}}}}$