12.8X34.5+12.8X12.3+46.8X87.2=?
1个回答
12.8*(34.5+12.3)+46.8*87.2
=12.8*46.8+46.8*87.2
=(12.8+87.2)*46.8
=100*46.8
=4680
对吗?
相关问题
12.8x34.5+12.8x12.3+46.8x87.2
5x+(8-x)=12.6x-(12+2x)=4怎么做5x+(8-x)=12.
x²+8x+12=8 x²+8x+12=8
12x-1.8=3.2-8x
3x一12X6=6 (5x一12)X8=24 (100一3x)÷2=8
1/8x+1/8x+12=2/5x
x-12/5=8/3
(1) 3x ²-8x-3 (2)12x ²-11x-15 (3)-12x ²-28+5
8x-12x=8+4 2/3x+3=3/