1

_____ tấn > 400 yến

2

a) 7 13 7 52

______ + _______ = _______ + _______ =

24 6 24 24

7 + 52 59

________ = ________

24 24

b) 12 1 12 7

_______ _ _____ = ______ _ _____ =

49 7 49 49

12 - 7 5

_________ = _______

49 49

c) 5 24 5 × 24 120

______ × ______ = _________ = _______

8 25 8 × 25 200

60

= _____ = 6

10

d) 38 19 38 3

______ : ______ = _____ × _____ =

21 3 21 19

38 × 3 112

__________ = _______

21 × 19 399

34287

×

65

__________

172 935

204722

___________

2220155

b)557 130 ÷ 42

137 13 265

11 1

2 73

210

0