神马作文网简算：299+537 755-198 10.3+29.97 14.2-2.4-4.6+4.8 10.8×6.9-0.69
来源：学生作业帮 编辑：神马作文网作业帮 分类：数学作业 时间：2024/11/12 18:08:57
简算：299+537 755-198 10.3+29.97 14.2-2.4-4.6+4.8 10.8×6.9-0.69×8 3∕8÷ 8+5∕8× 1∕8-1∕8
299+537 = 300-1 + 537 = 300 + 537 - 1 = 836
755-198 = 755 - 200 + 2 = 555 - 2 = 553
10.3+29.97 = 10.3 + 30 - 0.03 = 40.3 - 0.03 = 40.27
14.2-2.4-4.6+4.8 = 14.2 + 4.8 - (2.4 + 4.6) = 19 - 7 = 12
10.8×6.9-0.69×8 = 10.8 * 6.9 - 0.8 * 6.9 = (10.8 - 0.8) * 6.9 = 10 * 6.9 = 69
3∕8÷ 8+5∕8× 1∕8-1∕8 = 1/8 * (3/8 + 5/8) - 1/8 = 1/8 - 1/8 = 0
755-198 = 755 - 200 + 2 = 555 - 2 = 553
10.3+29.97 = 10.3 + 30 - 0.03 = 40.3 - 0.03 = 40.27
14.2-2.4-4.6+4.8 = 14.2 + 4.8 - (2.4 + 4.6) = 19 - 7 = 12
10.8×6.9-0.69×8 = 10.8 * 6.9 - 0.8 * 6.9 = (10.8 - 0.8) * 6.9 = 10 * 6.9 = 69
3∕8÷ 8+5∕8× 1∕8-1∕8 = 1/8 * (3/8 + 5/8) - 1/8 = 1/8 - 1/8 = 0
(-10.3)-(-6.9)+(+3.6)
6.9-【6.9-12】 简算
0.69*101简算?
10.3×9.7（简算）
6.9×7.99+0.69×20.1简便方法
4.8.2.4.6.9.5之间依次相加或相减等于十,
6.9×25×8 简算
198乘45简算
(2.4乘0.9乘4.8)除以(1.2乘2.7乘0.16)简算
(7.8乘4.8乘7.5）除以（3.9乘2.4乘1.5）简算.
(1.2*3.6*10.8+2*6*18+1/13*3/13*9/13)/(1.2*2.4*4.8+2*4*8+1/13
(1.2*3.6*10.8+2*6*18+13/1*13/3*13/9)除以(1.2*2.4*4.8+2*4*8+13/