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

Toán Lớp 6: Bài 1. Tính nhanh a) 248+17+716 b) 5.25.19.2.4 c) 97.62+97.38 d) 243.219-243.119

Toán Lớp 6: Bài 1. Tính nhanh
a) 248+17+716
b) 5.25.19.2.4
c) 97.62+97.38
d) 243.219-243.119

Comments ( 2 )

  1. Giải đáp:
    248+17+716
    =265+716
    =981
    5.25.19.2.4
    =(5.2).(25.4).19
    =10.100.19
    =1000.19
    =19000
    97.62+97.38
    =97.(62+38)
    =97.100
    =9700
    243.219-243.119
    =243.(219-119)
    =243.100
    =24300

  2. a)
    248 + 17 + 716
    = 265 + 716
    = 981
    b)
    5 . 25 . 19 . 2 . 4
    = ( 5 . 2 ) . ( 25 . 4 ) .19
    =     10    .    100     .19
    =             19 000
    c)
    97 . 62 + 97 . 38
    = 97 . ( 62 + 38 )
    = 97 . 100
    = 9700
    d)
    243 . 219 – 243 . 119
    = 243 . ( 219 – 119)
    = 243 . 100
    = 24 300
    Chúc bạn học tốt.

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

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