Toán Lớp 3: TÍNH NHANH
32+63x a x(a x1-a:1)+32×8+32
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Toán Lớp 3: TÍNH NHANH
32+63x a x(a x1-a:1)+32×8+32
Comments ( 2 )
32+63xxaxx(axx1-a:1)+32xx8+32
=32xx1+63xxaxx(a-a)+32xx8+32xx1
=32xx1+32xx8+32xx1+63xxaxx0
=32xx(1+8+1)+0
=32xx10
=320
$32+63 × a × (a×1-a:1)+32×8+32$
$= 32 + 63 × a × ( a – a ) + 256 + 32$
$= 32 + 63 × a x 0 + 288$
$= 32 + 0 + 288$
$= 320$