40.2+0.2-1.0-0.8-1.0-0.6+0.4
1-0.2+0.4-0.5+0.8-1.0+1.2-1.4+1.6-1.8+2怎么巧算
1.0
简算:0.1×0.2×0.4×+0.2×0.4×0.8+0.3×0.6×1.2分之0.1×0.3×0.9×+0.2×0.
0.2+0.4+0.6+0.8+0.10+0.12+0.14+…+0.98=
0.8×1.0厘米等于多少
0.1×0.2×0.4+0.2×0.4×0.8+0.3×0.6×1.2)分之(0.1×0.3×0.9+0.2×0.6×0
计算:0.2+0.4+0.6+0.8+0.10+0.12+0.14+…+0.98(数列计算)过程)必采纳!
10-9.8+9.6-9.4+9.2-9+.+0.8-0.6+0.4-0.2简便运算
化成最简分数 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0.15 0.25 0.35 0.
计算0.2+0.4+0.6+0.8+0.10+0.12+0.14+0.16+0.18+0.20+0.22+...+0.9
0.1×0.2×0.3×0.4×0.5×0.6×0.7×0.8×0.9怎么巧算
8十9.6-9.4+9.2—9+…+0.8—0.6+0.4—0.2