Toán Lớp 6: Câu 1. Thực hiện các phép tính sau:
a) 12 : { 400 : [500 – (125 + 25 . 7)]}
b) 5 . 22 – 18 : 3
c) 18 : 3 + 182 + 3.(51 : 17)
d) 25 . 8 – 12.5 + 170 : 17 – 8
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Toán Lớp 6: Câu 1. Thực hiện các phép tính sau:
a) 12 : { 400 : [500 – (125 + 25 . 7)]}
b) 5 . 22 – 18 : 3
c) 18 : 3 + 182 + 3.(51 : 17)
d) 25 . 8 – 12.5 + 170 : 17 – 8
Comments ( 2 )
Câu 1. Thực hiện các phép tính sau:
a) $12$ : { $400$ : [$500$ – ($1254 + $25$ . $7$ )]}
= $12$ : { $400$ : [$500$ – ($125$ + $25$ . $7$)]} = $12$ : { $400$ : [$500$ – ($125$ + $175$)]}
= $12$ : { $400$ : [$500$ – $300$]} = $12$ : { $400$ : $200$} = $12$ : $2$ = $6$
b) $5$ . $22$ – $18$ : $3$
= $110$ – $6$
= $104$
c) $18$ : $3$ + $182$ + $3$.($51$ : $17$)
= $197$
d) $25$ . $8$ – $12$.$5$ + $170$ : $17$ – $8$
= $285$
a)12:{400:[500-(125+25.7)]}
=12:{400:[500-(125+175)]}
=12:{400:[500-300]}
=12:{400:200}
=12:2
=6
————-
b)5.22-18:3
=110-6
=104
————-
c)18:3+182+3.(51:17)
=18:3+182+3.3
=6+182+9
=188+9
=197
————-
d)25.8-12.5+170:17-8
=200-60+10-8
=140+10-8
=150-8
=142
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