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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: làm giùm mk ba bài nì nha : 6/ (36+79)+(145–79–36) 7/ 10–[12–(-9-1)] 8/ (38–29+43)–(43+38) 9/ 271 – [(-43) + 271 – (-17)] 10/-144

Toán Lớp 6: làm giùm mk ba bài nì nha :
6/ (36+79)+(145–79–36)
7/ 10–[12–(-9-1)]
8/ (38–29+43)–(43+38)
9/ 271 – [(-43) + 271 – (-17)] 10/-144 – [29 – (+144) – (+144)]

Comments ( 1 )

  1. Lời giải và giải thích chi tiết:
    $6)(36+79)+(145-79-76)$
    $=36+79+145-79-76$
    $=(36-76)+(79-79)+145$
    $=-40+145$
    $=105$
    $7)10-[12-(-9-1)]$
    $=10-(12+9+1)$
    $=10-12-9-1$
    $=10-12+(-9-1)$
    $=-2-10$
    $=-12$
    $8)(38-29+43)-(43+38)$
    $=38-29+43-43-38$
    $=(38-38)+(43-43)-29$
    $=-29$

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222-9+11+12:2*14+14 = ? ( )