Question

25×32+2.7×680两种简便运算该怎么写？

Answer 1

25×32+2.7×680
=25×4×8+2.7×680
=100×8+2.7×680
=800+2.7×680
=800+（2+0.7）×680
=800+1360+476
=2160+476
=2636
=800+2.7×5

Answer 2

25x32+2.7x680
原式=25x32+（2.5+0.2）x680
=25x32+（25+2）x68
=25x32+25x68+2x68
=25x100+126
=2626

Answer 3

25x32+2.7x680
=25x32+（2.5+0.2）x680
=25x32+（25+2）x68
=25x32+25x68+2x68
=25x100+126
=2626

Answer 4

方法一：
25×32+2.7×680
=25×32+27×68
=25×32+（25+2）×68
=25×32+25×68+2×68
=25×（32+68）+136
=25×100+136
=2500+136
=2636
方法二：
25×32+2.7×680
=25×32+27×68
=（27-2）×32+27×68
=27×32-2×32+27×68
=27×32+27×68-2×32
=27×（32+68）-64
=27×100-64
=2700-64
=2636

Answer 5

25x32+2.7x680=25x32+27x68=25x32+(25+2)68=25x32+25x68+2x68=25(32+68)+136=2500+136=2636。25x32+2.7x680=25x4x8+2x680+0.7x680=800+1360+476=2160+476=2636