5+2+4= 5+4+3= 6+9+3= 3+4+9=7+9+3= 5+7+7= 4+1+9= 6+8+2=
简算4.9+0.1﹣4.9+0.110.78﹣(2.78+3.693)99.99×22.22+33.33×33.34(2.5×2.5+2.5×2.5+2.5×2.5+2.5×2.5)×8.
计算
根据46×15=690,1575÷15=105,直接写出下面各题的结果.4.6×15= 0.46×0.15= 15.75÷0.15= 15.75÷1.5= .
看图列式,不计算