Question

简便运算

Answer 1

81×1/3×42×1/6
=(81×1/3)×(42×1/6)
＝27×7
=189

Answer 2

1/3✘1/6✘81✘42=1/18✘81✘42=1/2✘9✘42=9✘21=189

Answer 3

=（3×27）×1/3×(6×7)×1/6=27×7=189

Answer 4

我三年级

追问

会不会做

追答

不会