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đổi 4m = 40 dm ; 3m = 30 dm
diện tích của 1 viên gạch là:
2 x 2 = 4 (dm2)
diện tích của cái sân là:
40 x 30 = 1200 (dm2)
cần số viên để lát đủ cái sân là:
12000 : 4 = 300 (viên)
đ\s..........
đổi 4m = 40 dm ; 3m = 30 dm
diện tích của 1 viên gạch là:
2 x 2 = 4 (dm2)
diện tích của cái sân là:
40 x 30 = 1200 (dm2)
cần số viên để lát đủ cái sân là:
12000 : 4 = 300 (viên)
đáp số..............


200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000+200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000=4000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
k mình nha làm ơn đó
=4000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000