简便计算：0.36×72+8.4×3.6-560×0.036999.99×222.22+333.33×333.34．

Question

简便计算：
0.36×72+8.4×3.6-560×0.036
999.99×222.22+333.33×333.34．

Answer 1

①0.36×72+8.4×3.6-560×0.036，
=0.36×72+8.4×（10×3.6）-（56×10）×0.036，
=0.36×72+（8.4×10）×0.36-56×（10×0.036），
=0.36×72+84×0.36-56×0.36，
=0.36×（72+84-56），
=0.36×100，
=36；

②999.99×222.22+333.33×333.34，
=（333.33×3）×222.22+333.33×333.34，
=333.33×（3×222.22）+333.33×333.34，
=333.33×666.66+333.33×333.34，
=333.33×（666.66+333.34），
=333.33×1000，
=333330．