Question

用乘法分配律简算：7.5×7.7+25×0.69

Answer 1

7.5×7.7+25×0.69
=25×0.4×7.5+25×0.69
=25×3.08+25×0.69
=25×(3.08+0.69）
=94.25

Answer 2

7.5*7.5+0.2*7.5+25*0.7-25*0.01=56.25+1.5+17.5-0.25=75 还有楼上你是喝醉了来坑人的吗，你自己计算器算算答案再来啊

追问

要用递等式。