Đặt tính rồi tính

a) 168 + 734 b) 334 + 666 c) 321 - 208

d) 673 – 569 e) 554 – 259 f) 956 – 128

g) 576 + 249 h) 791 + 179 i) 682 – 299

Số đã cho

18

36

72

54

Giảm 6 lần

18 : 6 = 3

Giảm 9 lần

18 : 9 = 2

a) (48 + 13) ´ 4 – 279 : 9

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c) 867 – 24 ´ 2 – 621 : 9

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b) 832 – 816 : 8 ´ (24 : 8)

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d) (596 – 496) ´ 9 + 2 ´ (456 : 4)

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