计算:0.57×9.8+90.2×0.52=? 3.99+(6-3/8×2/7)=?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 04:45:12
![计算:0.57×9.8+90.2×0.52=? 3.99+(6-3/8×2/7)=?](/uploads/image/z/364390-70-0.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%9A0.57%C3%979.8%2B90.2%C3%970.52%3D%3F+3.99%2B%EF%BC%886-3%2F8%C3%972%2F7%EF%BC%89%3D%3F)
计算:0.57×9.8+90.2×0.52=? 3.99+(6-3/8×2/7)=?
计算:0.57×9.8+90.2×0.52=? 3.99+(6-3/8×2/7)=?
计算:0.57×9.8+90.2×0.52=? 3.99+(6-3/8×2/7)=?
0.57×9.8+90.2×0.52
=(0.52+0.05)×9.8+90.2×0.52
=0.52×9.8+0.05×9.8+90.2×0.52
=(9.8+90.2)×0.52 +0.05×2×4.9
=100×0.52 + 0.1×4.9
=52+0.49
=52.49
.
3.99+(6-3/8×2/7)