7.2乘9.9除0.25
=7.2×(10-0.1)÷0.25
=(72-0.72)×4
=288-2.88
=285.12;
666乘9加46乘111
=111×6×9+46×111
=111×(54+46)
=111×100
=11100
如果本题有什么不明白可以追问,
7.2乘9.9除0.25
=7.2×(10-0.1)÷0.25
=(72-0.72)×4
=288-2.88
=285.12;
666乘9加46乘111
=111×6×9+46×111
=111×(54+46)
=111×100
=11100
如果本题有什么不明白可以追问,