25x32x1.25
=25×4×8×1.25
=100×10
=1000;
8.5x4.7+53x0.85
=8.5×4.7+5.3×8.5;
=8.5×(4.7+5.3)
=8.5×10
=85;
81除于14+17x14分之1
=(1/14)×(81+17)
=(1/14)×98
=7;
5-8分之3x3分之2-4分之3
=5-1/4-3/4
=5-(1/4+3/4)
=5-1
=4;
如果本题有什么不明白可以追问,
25x32x1.25
=25×4×8×1.25
=100×10
=1000;
8.5x4.7+53x0.85
=8.5×4.7+5.3×8.5;
=8.5×(4.7+5.3)
=8.5×10
=85;
81除于14+17x14分之1
=(1/14)×(81+17)
=(1/14)×98
=7;
5-8分之3x3分之2-4分之3
=5-1/4-3/4
=5-(1/4+3/4)
=5-1
=4;
如果本题有什么不明白可以追问,