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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: Bài 1. Tính hợp lí: a) 35. 127 + 24 . 127 + 127 . 41 f) (–16) + (–209) + (–14) + 209 b) 87.23 + 13.9

Home/ Toán Lớp 6: Bài 1. Tính hợp lí: a) 35. 127 + 24 . 127 + 127 . 41 f) (–16) + (–209) + (–14) + 209 b) 87.23 + 13.9

Toán Lớp 6: Bài 1. Tính hợp lí: a) 35. 127 + 24 . 127 + 127 . 41 f) (–16) + (–209) + (–14) + 209 b) 87.23 + 13.9

Tháng Hai 18, 2023 Toán học 1 Comment 0 views

Toán Lớp 6: Bài 1. Tính hợp lí:
a) 35. 127 + 24 . 127 + 127 . 41 f) (–16) + (–209) + (–14) + 209
b) 87.23 + 13.93 + 70.87 g) (–12) + (–13) + 36 + (–11)
c) 29.87 – 29.23 + 64.71
d) 37 . 39 + 62 . 21 – 11 . 39 – 21 . 36
e) 54 . 19 . 4 + 12 . 76 + 2 . 38 . 34 h) 55+ 56 + 57 + 58 – 35 – 36 – 37 – 38
i) 1 + 4 + 7 +10 + …+ 178
k) 3 – 5 + 7 – 9 + … -145
ae giúp mik đi
cảm ơn mn

Comments ( 1 )

  1. bichquyenlien
    bichquyenlien
    18 Tháng Hai, 2023 at 7:23 sáng
    Reply
    a) 35. 127 + 24 . 127 + 127 . 41
    = 127.(35+24+41)
    = 127.100
    = 12700
    b) 87.23 + 13.93 + 70.87
    = (87.23 + 70.87) + 13.93
    = 87(23+70) + 13.93
    = 87.93 + 13.93
    = 93(87+13)
    =93.100
    =9300
    c) 29.87 – 29.23 + 64.71
    = 29(87-23) + 64.71
    = 29.64 + 64.71
    = 64(29+71)
    = 64.100
    = 6400
    d) 37.39 + 62.21 – 11.39 – 21.36
    = (37.39 + 11.39) + (62.21 – 21.36)
    = 39(37-11) + 21(62-36)
    = 39.26 + 21.26
    = 26(39+21)
    = 26.60
    = 1560
    e) 54.19.4 + 12.76 + 2.38.34
    = 54.76 + 12.76 + 76.34
    = 76(54+12+34)
    = 76.100
    = 7600
    f) (–16) + (–209) + (–14) + 209
    = (-16-14) + (-209+209)
    = -30 + 0
    = -30
    g) (–12) + (–13) + 36 + (–11)
    = (-12-13-11) + 36
    =-36 + 36
    = 0
    h) 55+ 56 + 57 + 58 – 35 – 36 – 37 – 38
    =(55-35) + (56-36) + (57-37) + (58-38)
    = 20 + 20 + 20 + 20
    = 80
    i) 1 + 4 + 7 +10 + …+ 178
    =(1+178) + (4+175) + (7+172) +….
    =179.60
    = 10740
    k) 3 – 5 + 7 – 9 + … -145
    = (3-5) + (7-9) + (11-13) ….+(143-145)
    = (-2).72
    =-144

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222-9+11+12:2*14+14 = ? ( )

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