1·25x0·7x0·8
=1.25x0.8x0.7
=0.7
2·7x3·7+0·37x73
=2.7x3.7+3.7x7.3
=3.7x(2.7+7.3)
=3.7x10
37
8·7x99
=8.7x100-8.7
=870-8.7
=861.3
1.25乘0.8乘0.7
=2.7乘3.7+3.7乘7.3
=(2.7+7.3)乘3.7
=10乘3.7
=37
8.7乘99
=8.7乘(100-1)
=8.7乘100-1乘8.7
=870-8.7
=( )
0.8乘12.5-12.5
1.25乘80乘0.4乘2.5
1.25×0.8×0.7
0.7 37 861.3 9 101