500 + x = 100 + 500
300 - x = 300 + 200
400 - x = 200 + 400
b) 200 x 4 = ...... 300 x 2 = ......
200 x 2 = ...... 300 x 3 = ......
400 x 2 = ...... 500 x 1 = ......
100 x 4 = ...... 100 x 3 = ......
b) 200 x 4 = .800..... 300 x 2 = ..600....
200 x 2 = .400..... 300 x 3 = ...900...
400 x 2 = ...800... 500 x 1 = ..500....
100 x 4 = ..400.... 100 x 3 = .300.....
x+100=200-300
x-300=400-500
x + 100 = 200 - 300
x + 100 = - 100
x = 100 - 100
x = 0
x - 300 = 400 - 500
x - 300 = -100
x = -100 + 300
x = 200
k mik mik k lại
x + 100 = 200 - 300
x + 100 = -100
x = -100 - 100
x = -200
x - 300 = 400 - 500
x - 300 = -100
x = -100 + 300
x = 200
Tìm x: X * 100 + X* 200 + X * 300 + X * 400 + X * 500 + X * 512 = 2012
X x 100 + X x 200 + X x 300 + X x 400 + X x 500 + X x 512 = 2012
X x (100 + 200 + 300 + 400 + 500 + 512) = 2012
X x 2012 = 2012
X = 2012 : 2012
X = 1
thanks.
X * 100 + X* 200 + X * 300 + X * 400 + X * 500 + X * 512 = 2012
X * (100 + 200 + 300 + 400 + 500 + 512) = 2012
X * 2012 = 2012
X = 2012 : 2012
X = 1
Vậy X bằng 1
X x 100 + X x 200 + X x 300 + X x 400 + X x 500 + X x 512 = 2012
X x ( 100 + 200 + 300 + 400 + 500 + 512 ) = 2012
X x 2012 = 2012
X = 2012 : 2012
X = 1
100 x 200 x 300 x 400 x 500 + 000 x 600 x 700 x 800 x 900 x 1000
Tính.
a) 200 mm + 100 mm 300 mm – 100 mm 200 mm x 3 600 mm : 3
b) 300 g + 200 g 200 g × 5 500 g – 300g 1000g : 5
c) 400 ml + 300 ml 800 ml : 4 700 ml – 300 ml 200 ml x 4
a) 200 mm + 100 mm = 300 mm 300 mm – 100 mm = 200 mm |
200 mm x 3 = 600 mm 600 mm : 3 = 200 mm |
b) 300 g + 200 g = 500 g | 200g x 5 = 1 000g | 500g – 300g = 200g | 1 000g : 5 = 200g |
c)
400 ml + 300 ml = 700 ml
800 ml : 4 = 200 ml
700 ml – 300 ml = 400 ml
200 ml x 4 = 800ml
Tính nhẩm:
Cách làm: 200 x 3 = ?
Nhẩm: 2 trăm x 3 = 6 trăm
Vậy: 200 x 3 = 600
200 x 2 = 300 x 2 =
200 x 4 = 400 x 2 =
100 x 5 = 500 x 1 =
Học sinh nhẩm và ghi kết quả như sau:
200 x 2 = 400
200 x 4 = 800
100 x 5 = 500
300 x 2 =600
400 x 2 =800
500 x 1 =500
200 x 2 = 400 300 x 2 =600
200 x 4 = 800 400 x 2 =800
100 x 5 = 500 500 x 1 =500
X x 100 + X x 200 + X x 300 + X x 400 + X x 500 + X x 512 = 2012
mk đang cần gấp lắm ai đúng mk tick
X x 100 + X x 200 + X x 300 + X x 400 + X x 500 + X x 512 = 2012
X = 2012 : ( 100 + 200 + 300 + 400 + 500 + 512)
X = 2012 : 2012
X = 1
Nhớ k mình nhé
X x 100 + X x 200 + X x 300 + X x 400 + X x 500 + X x 512 = 2012
X x ( 100 + 200 + 300 + 400 + 500 + 512 ) = 2012
X x 2012 = 2012
X = 2012 : 2012
X = 1
100+100+200+200+300+300+400+400+500+500+600+600+700+700+800+800+900+900+?
100+100+200+200+300+300+400+400+500+500+600+600+700+700+800 = 6400
100+200+300+400+500+600+700+800+900+100+200+300+400+500+600+700+800+900
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