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

Toán Lớp 5: Tính nhanh 34×77+286×74-209×74 58×75+50×58-58×25 123×101 169×11 99×34

Home/ Toán Lớp 5: Tính nhanh 34×77+286×74-209×74 58×75+50×58-58×25 123×101 169×11 99×34

Toán Lớp 5: Tính nhanh 34×77+286×74-209×74 58×75+50×58-58×25 123×101 169×11 99×34

Tháng Hai 23, 2023 Toán học 2 Comments 0 views

Toán Lớp 5: Tính nhanh
34×77+286×74-209×74
58×75+50×58-58×25
123×101
169×11
99×34

Comments ( 2 )

  1. tuyetanhthu
    tuyetanhthu
    23 Tháng Hai, 2023 at 3:01 sáng
    Reply
    1)
    34 x 77 + 286 x 74 – 209 x 74
    = 34 x 77 + 74 x (286 – 209 )
    = 34 x 77 + 74 x 77
    = 77 x ( 34 + 74)
    = 77 x 108
    = 8316
    2)
    58 x 75 + 50 x 58 – 58 x 25
    =58 x (75+ 50 – 25 )
    = 58 x 100
    = 5800
    3)
    123 x 101
    =123 x  100 + 1 
    = 12300 + 1
    = 12301
    4)
    196 x 11
    = 169 x 10 + 1
    =1690 + 1
    = 1691
    5)
    99 x 34
    = (100 – 1) x 34
    = 34 x 100 – 34 x 1 
    = 3400 – 34
    = 3366
    Cho mình xin CTLHN nhé !!!

  2. baoquyen
    baoquyen
    23 Tháng Hai, 2023 at 3:00 sáng
    Reply
    $#min$
    1.
    34 × 77 + 286 × 74 – 209 × 74
    = 34 × 77 + 74 × (286 – 209 )
    = 34 × 77 + 74 × 77
    = 77 × ( 34 + 74)
    = 77 × 108
    = 8316
    2.
    58 × 75 + 50 × 58 – 58 × 25
    =58 × (75+ 50 – 25 )
    = 58 × 100
    = 5800
    3.
    123 × 101
    =123 ×  100 + 1
    = 12300 + 1
    = 12301
    4.
    196 × 11
    = 169 × 10 + 1
    =1690 + 1
    = 1691
    5.
    99 × 34
    = (100 – 1) × 34
    = 34 × 100 – 34 × 1
    = 3400 – 34
    = 3366
     

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

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