Question

99.9×778+333×66.6简便计算？

Answer 1

99.9×778+333×66.6
=9×11.1×2×389+3×111×6x11.1
=18×11.1×389+18×11.1×111
=18×11.1×（389+111）
=199.8×500
=199.8×（1000÷2）
=199.8×1000÷2
=199800÷2
=99900

Answer 2

99.9×778+333×66.6
=（33.3×3）×778+333×（33.3×2）
=33.3（778×3+333×2）
=33.3×（2334+666）
=33.3×3000
=99900

Answer 3

99.9×778+333×66.6
=99.9×778+999×22.2
=99.9×778+99.9×222
=99.9*（778+222）
=99.9*1000
=99900

Answer 4

由题意得知，可以将原式变为以下进行乘法结合律的简便计算
99.9×778+333×66.6=3×33.3×778+2×33.3×333=33.3×（3×778+2×333）
=33.3×（2334+666）
=33.3×3000
=99900

Answer 5

99.9ⅹ778+33.3x3x222
=99.9x778+99.9ⅹ222
=99.9x(778+222)
=99.9x1000
=99900。