递等式(能巧算就巧算)①26×20.2-8.4-1.8 ②(3.2×0.4-0.68)÷0.25×4
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/10/06 15:10:28
递等式(能巧算就巧算)①26×20.2-8.4-1.8 ②(3.2×0.4-0.68)÷0.25×4
过程、格式清楚点,一行一行
过程、格式清楚点,一行一行
① 26×20.2-8.4-1.8
= 26 X 2 X 10.1 -(8.4 + 1.8)
= 52 X 10.1 - 10.2
= 52.52- 10.2
= 42.32
②(3.2×0.4 - 0.68)÷0.25 × 4
=(3.2×0.4 - 0.68)÷(1/4)× 4
=(3.2×0.4 - 0.68)× 4 × 4
=(1.28 - 0.68)× 4 × 4
= 0.6 X 16
= 9.6
= 26 X 2 X 10.1 -(8.4 + 1.8)
= 52 X 10.1 - 10.2
= 52.52- 10.2
= 42.32
②(3.2×0.4 - 0.68)÷0.25 × 4
=(3.2×0.4 - 0.68)÷(1/4)× 4
=(3.2×0.4 - 0.68)× 4 × 4
=(1.28 - 0.68)× 4 × 4
= 0.6 X 16
= 9.6
递等式(能巧算就巧算)①26×20.2-8.4-1.8 ②(3.2×0.4-0.68)÷0.25×4
3.2×1.25×2.5 42.6÷2.5÷4 递等式(能简算要简算)
递等式计算(能简算要简算)
递等式计算 20.5+1.8*4-22.5÷1.5
8.4*7.2+0.84*28简便计算(递等式)
12.5*(8+0.4)*2.5(递等式计算)
960÷(24×8)(巧算)(递等式)
42300÷300(巧算)(递等式)
70.6+9.1÷(4.2-3.5)的递等式计算
(18.5*3.6+3.6*2.5)÷0.18递等式计算
27×【(1000-109)÷81】递等式计算
25×17×(4×13)递等式如何巧算