你好 很高兴为你解答0.49×52+0.52=49×0.52+0.52=0.52×（49+1）=0.52×50=26
0.49x52+0.52=0.49x52+0.01x52=(0.49+0.01)x52=0.5x52=26
0.5乘52减去0.52加0.52=26
