Question

1972×37+197.2-986×70.38用简便方法

1972×37+197.2-986×70.38用简便方法

Answer 1

原式=197.2X370+197.2-986X0.2X351.9
=197.2X370+197.2-197.2X351.9
=197.2X(370+1-351.9)
=197.2x19.1
=197.2X20-197.2X0.9
=3944-197.2+19.72
=3766.52

Answer 2

1972×37+197.2-986×70.38
=1972×37+1972×0.1-1972×35.19
=1972×(37+0.1-35.19)
=1972×1.91
=3766.52
题目有误