Răspuns:
23+(8x8+6x6):10x2=
=23+(64+36):20
=23+100:20
=23+5
=28
(6x8:4-20:5x3+6x7:1):(18:3:3+32:8)=
=(48:4-4x3+42:1):(6:3+4)
=(12-12+42):(2+4)
=(0+42):6
=42:6
=7
(8×7+7×7+6×7)-(24:3+80:8+35:7) =
=(56+49+42)-(8+10+5)
=(105+42)-(18+5)
=147-23
=124
(9×3:3+40:8):2+899=
=(27:3+5):2+899
=(9+5):2+899
=14:2+899
=7+899
=906
(64:8:2+3×10:6)×(63:7-24:6)+378=
=(8:2+30:6)x(9-4)+378
=(4+5)x5+378
=9x5+378
=45+378
=423
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