Question

2.5×5.4+6.5×5.4-8×3.8简便运算怎么写？

Answer 1

=5.4（2.5+6.5）－8*3.8
=5.4（8+1）－8.3.8
=8（5.4－3.8）+5.4
=14.8+5.4
=20.2

Answer 2

2.5＊5.4+6.5＊5.4-8＊3.8
=5.4＊（2.5+6.5）-8＊3.8
=5.4＊9-8＊3.8
=4＊（1.35＊9-2＊3.8）
=4＊（1.35＊（10-1）-7.6）
=4＊（13.5-1.35-7.6）
=4＊（13.5-8.95）
=4＊13.5-4＊8.95
=54-35.8
=18.2

Answer 3

2.5×5.4+6.5×5.4-8×3.8
=5.4×（2.5+6.5）-8×3.8
=5.4×9-8×3.8
=54-5.4-38+7.6
=16+2.2
=18.2

Answer 4

2.5×5.4+6.5×5.4-8×3.8
=5.4x(2.5+6.5) -8×3.8
=5.4x9-8×3.8
=5.4x8-8×3.8 + 5.4
=8x(5.4-3.8) +5.4
=8x1.6 +5.4
=12.8+5.4
=18.2

Answer 5

2.5×5.4+6.5×5.4-8×3.8
=（2.5+6.5）×5.4-8×3.8
=9×5.4-8×3.8
=48.6-30.4
=18.2