Toán Lớp 6: Giúp mik gấp vs
1
a) 4×25-12×5+170:10
b) (7+27:9).4-3
c) 12: {400:[500-(125+25×7)]}
d) 168+ {[2x (16+9)-256]:14}
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Toán Lớp 6: Giúp mik gấp vs
1
a) 4×25-12×5+170:10
b) (7+27:9).4-3
c) 12: {400:[500-(125+25×7)]}
d) 168+ {[2x (16+9)-256]:14}
Comments ( 2 )
a) 4×25-12×5+170:10
= 100 – 60 +17
= 40 + 17
= 57.
b) (7+27:9).4-3
=(7+3).4-3
=10.4-3
=40-3
=10.
c) 12:{400:[500-(125+25×7)]}
=12:{400:[500-(125+175)]}
=12:{400:[500-300]}
=12:{400:200}
=12:2
=6
= 100 – 60 + 17
= 57
= 12:{400:[500-( 125 + 175 )]}
= 12:{400:[500- 300 ]}
= 12:{400: 200 }
= 12 : 2
= 6
= 168+{[2.(16 + 9 ) – 1 ] : 49}
=168+{[ 2 . 25 – 1 ]: 49}
= 168+ {( 50 – 1 ) : 49}
= 168 + {49 : 49}
= 168 + 1
= 169