Toán Lớp 6: 568-{5[143-(4-1)^2 ]+10}:10
2011+ 5[300-(17-7) .2]
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Toán Lớp 6: 568-{5[143-(4-1)^2 ]+10}:10
2011+ 5[300-(17-7) .2]
Comments ( 2 )
568 – {5[143 – (4 – 1)^2] + 10} : 10
= 568 – {5 * [143 – 3^2] + 10} : 10
= 568 – {5 * [143 – 9] + 10} : 10
= 568 – {5 * 134 + 10} : 10
= 568 – {670 + 10} : 10
= 568 – 680 : 10
= 568 – 68
= 500
_______________________________
2011 + 5[300 – (17 – 7) * 2]
= 2011 + 5 * [300 – 10 * 2]
= 2011 + 5 * [300 – 20]
= 2011 + 5 * 280
= 2011 + 1400
= 3411
Giải đáp:+Lời giải và giải thích chi tiết:
568 – {5 [143 – (4 – 1)^2] + 10} : 10
= 568 – {5 [143 – 3^2] + 10} : 10
= 568 – {5 [143 – 9] + 10} : 10
= 568 – {5.134 + 10} : 10
= 568 – {670 + 10} : 10
= 568 – 680 : 10
= 568 – 68
= 500
————————————————————–
2011 + 5[300 – (17 – 7).2]
= 2011 + 5[300 – 10.2]
= 2011 + 5.[300 – 20]
= 2011 + 5.280
= 2011 + 1400
= 3411