Question

9.8×1.25+1.25×0.15-1.25×3.3简便方法怎么算？

Answer 1

9.8 × 1.25 + 1.25 × 0.15 - 1.25 × 3.3
= 1.25 × (9.8 + 0.15 - 3.3)

= 1.25 × 6.65
= 1.25 × 8 × 6.65/8

= 10 × 0.83125

= 8.3125

Answer 2

9.8×1.25+1.25×0.15-1.25×3.3

=1.25×（9.8+0.15-3.3）
=1.25×6.65
=8.3125

Answer 3

9.8×1.25+1.25×0.15-1.25×3.3=1.25×(9.8+0.15-3.3)=(1+0.2+0.05)×(6+0.6+0.05)=6+0.6+0.05+1.2+0.12+0.01+0.3+0.03+0.0025=7.2+1.02+0.09+0.0025=8.22+0.0925=8.3125