Question

1.9×7.5×1.9×7.4-1.9等于多少简便方法？

Answer 1

这个题你应该是写错一个符号了吧，这个式子应该是1.9×7.5－1.9×7.4－0.19，具体计算过程如下:
1.9×7.5－1.9×7.4－0.19
=1.9×7.5－1.9×7.4－1.9×0.1
=1.9（7.5－7.4－0.1）
=1.9×0
=0
望采纳。

Answer 2

解：

1.9×7.5×1.9×7.4-1.9
=（2-0.1）×7.5×1.9×7.4-1.9
=(15-0.75) ×1.9×7.4-1.9
=1.9 ×(14.25 ×7.4-1)
=1.9 ×104.45
=198.455

Answer 3

1.9×7.5×1.9×7.4-1.9等于多少简便方法？
1.9×7.5×1.9×7.4-1.9
=1.9x(7.5X7.4X1.9-1)
=1.9x(105.45-1)
=1.9x104.45
=198.455

Answer 4

1.9×（7.4+7.5-1)
=1.9x13.9
=26.41

Answer 5

是不是写错一个运算符？