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

Toán Lớp 6: gấp mẫu 106.21=[100+6] . 21 = 100.21+6.21 = 2100+6.[20+1]=2100+120+6=2226 a] 35.29 b] 403 . 54 c]9998.12 gấp ạ

Toán Lớp 6: gấp
mẫu 106.21=[100+6] . 21 = 100.21+6.21 = 2100+6.[20+1]=2100+120+6=2226
a] 35.29 b] 403 . 54 c]9998.12
gấp ạ

Comments ( 1 )

  1. $\text{Giải đáp+Lời giải và giải thích chi tiết:}$
    a) 35.29
    =(30+5).29=30.29+5.29=870+5(20+9)=870+100+45=1015
    b)403.54
    =(400+3).54=400.54+3.54=21600.3(50+4)=21600+150+12=21762
    c)9998.12
    =9998.(10+2)=10.9998+2.9998=99980+2(9000+998)=99980+18000+1996=119976

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

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