Question

怎么做这两道题 简便计算？

Answer 1

第一题：
原式=6.6×5.4+3.3×4.6×2
=6.6×5.4+6.6×4.6
=6.6×(5.4+4.6)
=6.6×10
=66

第二题：
原式=37.3×179.5-37.3×86.5-37.3×90+37.3×7
=37.3×（179.5-90+7-86.5）
=37.3×10
=373

Answer 2

Answer 3

6.6x5.4+3.3x9.2
=6.6x5.4+3.3x2x4.6
=6.6x5.4+6.6x4.6
=6.6x（5.4+4.6）
=6.6x10
=66
37.3x179.5-865x3.73-0.373x9000+0.7x373
=3.73x1795-3.73x865-3.73x900+3.73x70
=3.73x（1795-865-900+70）
=3.73x100
=373

Answer 4

1、6.6×5.4+3.3×9.2
＝6.6×5.4+6.6×4.6
＝6.6×（5.4+4.6）
＝6.6×10
＝66
2、37.3×179.5-865×3.73-0.373×9000+0.7×373
＝373×（17.95-8.65-9+0.7）
＝373×1
＝373

Answer 5

6.6×5.4+3.3×9.2
=6.6×5.4+3.3×2×4.6
=6.6×（5.4+4.6）
=6.6×10
=66
37.3×179.5-865×3.73-0.373×9000+0.7×373
=37.3×179.5-86.5×37.3-37.3×90+7×37.3
=37.3×（179.5-86.5-90+7）
=37.3×10
=373