Tìm x :
1 . Tìm x :
a ) x x 4,3 = 774 b ) 0,125 x x = 16 c ) 100 : x = 0,25
x = ...................... x = .................... x = ...................
x = ...................... x = .................... x = ...................
2 . Đặt tính rồi tính :
a ) 39,44 : 2,9 b ) 2,356 : 0,62 c ) 0,1302 : 1,45
........................... .......................... ...........................
........................... .......................... ...........................
........................... .......................... ...........................
........................... .......................... ...........................
3 . Một bình đựng 4,8l dầu cân nặng 4,148kg ( riêng vỏ bình cân nặng nửa kg ) . Hỏi một thùng chứa 15,6l dầu cân nặng tất cả bao nhiêu ki - lô - gam ? ( biết vỏ thùng cân nặng 2,5kg )
Bài giải
.................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
a ) x x 4,3 = 774 b ) 0,125 x x = 16 c ) 100 : x = 0,25
x = ...................... x = .................... x = ...................
x = ...................... x = .................... x = ...................
2 . Đặt tính rồi tính :
a ) 39,44 : 2,9 b ) 2,356 : 0,62 c ) 0,1302 : 1,45
........................... .......................... ...........................
........................... .......................... ...........................
........................... .......................... ...........................
........................... .......................... ...........................
3 . Một bình đựng 4,8l dầu cân nặng 4,148kg ( riêng vỏ bình cân nặng nửa kg ) . Hỏi một thùng chứa 15,6l dầu cân nặng tất cả bao nhiêu ki - lô - gam ? ( biết vỏ thùng cân nặng 2,5kg )
Bài giải
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