200 + x = 300 + 200
200 + x = 500
x = 500 - 200
x = 300
200 + x =300 + 200
200 + x =500
x =500 - 200
x =300
\(200+x=300+200\)
\(200+x=500\)
\(x=500-200\)
200 + x = 300 + 200
200 + x = 500
x = 500 - 200
x = 300
200 + x =300 + 200
200 + x =500
x =500 - 200
x =300
\(200+x=300+200\)
\(200+x=500\)
\(x=500-200\)
500 + x = 100 + 500
300 - x = 300 + 200
400 - x = 200 + 400
Tìm x :
a ) x + 130 - 200 = 300 : 6
b ) x + 300 = 200 x 2
X +200 = 300 + 200
x+200=300-200
Tìm x :
a ) x + 170 - 200 = 300 : 6
b ) x + 300 = 200 x 2
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 = ......
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 =
x + 200 = 300 + 300
100+100+200+200+300+300=