19.98×51+199.8×3.9+199.8是多少
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19.98×51+199.8×3.9+199.8是多少
19.98×51+199.8×3.9+199.8是多少
19.98×51+199.8×3.9+199.8是多少
19.98×51+199.8×3.9+199.8
=19.98×51+199.8×39+19.98×10
=19.98×(51+39+10)
=19.98×100
=1998
199.8*5.1+199.8*4.9
=199.8*(5.1+4.9)
=199.8*10
=1998
19.98×51+199.8×3.9+199.8
=199.8×5.1+199.8×3.9+199.8×1
=199.8×(5.1+3.9+1)
=199.8×10
=1998
19.98×51+199.8×3.9+199.8是多少
199.9*19.98-199.8*19.97
计算 199.8+19.98+1.998+2.222
(1)1.99×199.8-19.98×19.7简便计算(2)1999+999×999简便计算
199.8+19.98+1.998+2.222的简便方法?
1998+199.8+19.98+1.998+2.222=
199.8+19.98+1.998+2.222 要过程
19.98×37-199.8×1.9 1998×0.
1998+199.8+19.98+1.998简便算法
199.9×19.98-19.99×199.8用简便方法怎么计算
19.98*37+199.8*2.3+9.99*80=简算
19.98*37-199.8*1.9+1998*0.82的简便运算
用简便方法计算:19.98*37-199.8*1.9+1998*0.82
199.9×19.98-199.8×19.97(简便计算,递等式)给好评.
19.98×3.7+199.8×0.23+9.99×8要有过程
用简便方法计算 19.98×37-199.8×1.9+1998×0.82
1998+199.8+19.98+1.98+2.222计算过程怎么算
19.98×37-199.8×1.9+1.998×20简便计算怎么算