25x16x25x84=?78+22x7=?39x102=?104x25=?{25x13}x4=?
问题描述：
25x16x25x84=?
78+22x7=?
39x102=?
104x25=?
{25x13}x4=?
答
1.25x16x25x84=25x4x(25x4)x84=100x100x84=840000
2.78+22x7=78+(20+2)x7=78+20x7+2x7=78+140+14=232
3.39x100+39x2==3978
4.100x25+100x4=2900
5.25x4x13=1300
答
25×16×25×84
＝5×5×4×4×5×5×2×41
答
25x16x25x84=25x4x(25x4)x84=100x100x84=84000078+22x7=78+(20+2)x7=78+20x7+2x7=78+140+14=23239x102=39x(100+2)=39x100+39x2=3900+78=3978104x25=(100+4)x25=100x25+4x25=2500+100=2600{25x13}x4==25x13x4=25x4X13...
答
25×4×4×25×84