Toán Lớp 3: Bài 2:Tính nhẩm:
a)5*5*4
b)60*10*100
c)40.50.30
d)125.8.2
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Toán Lớp 3: Bài 2:Tính nhẩm:
a)5*5*4
b)60*10*100
c)40.50.30
d)125.8.2
Comments ( 2 )
Giải thích các bước giải:
a) 5×(5×4) =5×20 =100
b)60×(10×100)=60×1000=60000
c)(40×50)×30 =200×30=60000
d)(125×8)×2 =1000×2=2000