Question

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一、简便运算
1.5959×65÷59－65 2.999²÷999 3.8888×7＋1111×44

4.25×12.5×32 5.4.85×0.17＋0.485×8.3 6.2009×2008／2010

7.999000÷25÷4 8.10.2×43

Answer 1

5959×65÷59－65=（5959÷59-1）*65=100*65=6500
999²÷999=999
8888×7＋1111×44=1111×56+1111×44=1111×（56+44）=1111×100=1111000
25×12.5×32=（25*4）*（8*12.5）=100*100=10000
4.85×0.17＋0.485×8.3=4.85*0.17+4.85*0.83=4.85*（0.17+0.83）=4.85
2009×2008／2010=？？
999000÷25÷4 =999000÷（25*4）=9990
10.2*43=10*43+0.2*43=430+8.6=438.6

Answer 2

5959×65÷59－65

=5959÷59x65-65×1

=（101-1）×65

=6500

Answer 3

(1.5959-1)÷59X65=0.6565