Question

7.81×3.1+6.9×4.29+3.52×6.9的简便计算是什么？

Answer 1

7.81x3.1+6.9x4.29+3.52x6.9的简便计算为7.81x3.1+6.9x（4.29+3.52）=7.81x3.1+6.9x7.81=7.81x（3.1+6.9）=7.81x10=78.1

Answer 2

7.81×3.1+6.9×4.29+3.52×6.9=78.1
7.81×3.1=24.211
6.9×4.29=29.601
3.52×6.9=24.288
24.211+29.601+24.288=78.1
（4.29+3.52）×6.9=53.889
24.211+53.889=78.1

Answer 3

7.81×3.1+6.9×4.29+3.52×6.9
=7.81×3.1+6.9×（4.29+3.52）
=7.81×3.1+6.9×7.81
=7.81×（3.1+6.9）
=7.81×10
=78.1

Answer 4

7.81X3.1+6.9X4.29+3.52X6.9
=7.81X3.1+6.9X（4.29+3.52）
=7.81X3.1+6.9X7.81
=7.81X（3.1+6.9）
=7.81X10
=78.1

Answer 5

7.81×3.1+6.9×4.29+3.52×6.9=7.81×3.1+6.9×（4.29+3.52）=7.81×3.1+6.9×7.81=7.81×（3.1+6.9）=7.81×10=78.1