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

Toán Lớp 5: Viết theo mẫu: Mẫu: 4,25 $\times$ 30 = 4,25 $\times$ 3 $\times$ 10 = 12,75 $\times$ 10 = 127,5 a, 6,34 $\times$40 = -. b, 0,67 $\tim

Toán Lớp 5: Viết theo mẫu:
Mẫu: 4,25 $\times$ 30 = 4,25 $\times$ 3 $\times$ 10 = 12,75 $\times$ 10 = 127,5
a, 6,34 $\times$40 = …..
b, 0,67 $\times$ 50 = …..
c, 0.09 $\times$ 500 = …..
d, 12,45 $\times$ 400 = ….

Comments ( 2 )

  1. a) 6,34 xx 40 = 6,34 xx 4 xx 10 = 25,36 xx 10 = 253,6
    b) 0,67 xx 50 = 0,67 xx 5 xx 10 = 3,35 xx 10 = 33,5
    c) 0,09 xx 500 = 0,09 xx 5 xx 100 = 0,45 xx 100 = 45
    d) 12,45 xx 400 = 12,45 xx 4 xx 100 = 49,8 xx 100 = 4980

  2. Dựa theo mẫu ta được bài làm:
    a)6,34×40=6,34×4×10=25,36×10=253,6;
    b)0,67×50=0,67×5×10=3,35×10=33,5;
    c)0,09×500=0,09×5×100=9×5=45;
    d)12,45×400=12,45×4×100=1245×4=4980.

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

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