Question

五年级数学简便计算

5.93×8.9+4.02×8.9

Answer 1

这个是根据乘法分配律来解决，观察+两边的乘法都有共同的数字8.9，先拿出来，写作8.9x(5.93+4.02)=8.9x9.95，发现还是不简便，再用一次，把9.95写成10-0.05，得8.9x（10-0.05）=8.9x10-8.9x0.05=89-0.445=88.555

Answer 2

5.93×8.9+4.02×8.9
=8.9x(5.93+4.02)
=8.9x9.95
=8.9x(10-0.05)
=8.9x10-8.9x0.05
=89-0.445
=88.555

Answer 3

5.93×8.9+4.02×8.9
=(5.93+4.02)×8.9
=(10-0.05)×8.9
=89-0.445
=88.555

Answer 4

解：5.93×8.9+4.02×8.9
=（5.93+4.02）x8.9
=9.95x8.9
=88.555

Answer 5

5.93×8.9+4.02×8.9
=(5.93+4.02)×8.9
=9.95×8.9
=(10-0.05)×8.9
=89-0.445
=88.555

Answer 6

（5.93+4.02）x8.9