Question

19.5×6.2×2.3用简便方法怎么做

Answer 1

19.5×6.2×2.3用简便方法怎么做

19.5*6.2*2.3
=(20-0.5)*6.2*2.3
=(124-3.1)*2.3
=120.9*(2+0.3)
=241.8+36.27
=278.07

小学题95 19.5 19.5 5.55用简便方法怎么做

95 19.5 19.5 5.55用简便方法怎么做
95 19.5 19.5 5.55
=95+19.5*2+5.55
=95+38+5.55
=138.55

0.9*3.8+6.2用简便方法怎么做

解0.9×3.8+6.2
=（1-0.1）×3.8+6.2
=3.8-0.38+6.2
=3.8+6.2-0.38
=10-0.38
=9.62

6.2×2.1减去2.1,用简便方法怎么做?

6.2x2.1-2.1
=2.1x(6.2-1)
=2.1x(5+0.2)
=10.5+0.42
=10.92

1.02×77+2.3×102用简便方法怎么做

你好，很高兴为你解答
1.02×770+2.3×102用简便方法这样做
=102x7.7+2.3x102
=102x（7.7+2.3）
=1020
满意采纳哦！

1.56+3.8+6.2的简便方法怎么做

1.56+3.8+6.2
=1.56+（3.8+6.2）
=1.56+10
=11.56

13.8+45.8-6.2+54.42的简便方法怎么做

13.8+45.8-6.2+54.42
=13+0.8+45+0.8-5-1.2+55-0.58
=8+100+1.6-1.2-0.58
=108+0.4-0.58
=108-0.18
=107.82
望采纳，谢谢！

用简便方法计算3.67*4.8+3.67*6.2-3.67怎么做？

3.67*4.8+3.67*6.2-3.67
=3.67(4.8+6.2-1)
=3.67*10
=36.7

19.5-19.5x0.4用简便方法

19.5-19.5x0.4
＝19.5x(1.-0.4)
=19.5x0.6
=11.7