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(8:2+50:10)x3-7+(8x6-40):8=

Răspuns :

( 8: 2 + 50 : 10 ) × 3 - 7 + ( 8 × 6 - 40 ) : 8 =
( 4 + 5 ) × 3 - 7 + ( 48 - 40 ) : 8 =
9 × 3 - 7 + 8 : 8 =
27 - 7 + 1 =
20 + 1 =
21
(8÷2+50÷10)×3-7+(8×6-40)÷8=
=(4+5)×3-7+(48-40)÷8
=9×3-7+8÷8
=27-7+1
=20+1
=21