数学计算化简题1.234²+0.766²+2.468×0.766-3.35²+0.65²

来源：学生作业帮助网编辑：作业帮时间：2024/11/15 17:40:41

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数学计算化简题1.234²+0.766²+2.468×0.766-3.35²+0.65²
数学计算化简题
1.234²+0.766²+2.468×0.766-3.35²+0.65²

数学计算化简题1.234²+0.766²+2.468×0.766-3.35²+0.65²
原式=1.234²+（0.766²+2.468×0.766）+（0.65²-3.35²）
=1.234²+0.766*(0.766+2.468)+(0.65+3.35)(0.65-3.35)
=1.234²+0.766*3.234-4*2.7
=1.234²+0.766*1.234+0.766*2-4*2.7
= 1.234*(1.234+0.766)+0.766*2-4*2.7
=(1.234+0.766)*2-10.8
=-6.8

1.234²+0.766²+2.468×0.766-3.35²+0.65²
=1.234²+0.766²+2x1.234×0.766+0.65²-3.35²
=(1.234+0.766)^2+(0.65+3.35)(0.65-3.35)
=4-10.8
=-6.8