早教吧作业答案频道 -->数学-->
计算(1)3.75×4.8+63.5×0.48-48×0.01(2)11×22+0.22×3300+330×4.4(3)(10-355×1)+(9-355×2)+(8-355×3)+…+(1-355×10).
题目详情
计算
(1)3.75×4.8+63.5×0.48-48×0.01
(2)11×22+0.22×3300+330×4.4
(3)(10-
×1)+(9-
×2)+(8-
×3)+…+(1-
×10).
(1)3.75×4.8+63.5×0.48-48×0.01
(2)11×22+0.22×3300+330×4.4
(3)(10-
3 |
55 |
3 |
55 |
3 |
55 |
3 |
55 |
▼优质解答
答案和解析
(1)3.75×4.8+63.5×0.48-48×0.01
=3.75×4.8+6.35×4.8-4.8×0.1
=(3.75+6.35-0.1)×4.8
=10×4.8
=48;
(2)11×22+0.22×3300+330×4.4
=11×22+22×33+33×44
=(11+33)×22+33×44
=44×22+33×44
=44×(22+33)
=44×55
=2420;
(3)(10-
×1)+(9-
×2)+(8-
×3)+…+(1-
×10)
=10-
×1+9-
×2+8-
×3+…+1-
×10
=(10+9+8+…+1)-(
×1+
×2+
×3+…+
×10)
=(10+9+8+…+1)-
×(1+2+3+…+10)
=(10+9+8+…+1)×(1-
)
=55×
=52.
=3.75×4.8+6.35×4.8-4.8×0.1
=(3.75+6.35-0.1)×4.8
=10×4.8
=48;
(2)11×22+0.22×3300+330×4.4
=11×22+22×33+33×44
=(11+33)×22+33×44
=44×22+33×44
=44×(22+33)
=44×55
=2420;
(3)(10-
3 |
55 |
3 |
55 |
3 |
55 |
3 |
55 |
=10-
3 |
55 |
3 |
55 |
3 |
55 |
3 |
55 |
=(10+9+8+…+1)-(
3 |
55 |
3 |
55 |
3 |
55 |
3 |
55 |
=(10+9+8+…+1)-
3 |
55 |
=(10+9+8+…+1)×(1-
3 |
55 |
=55×
52 |
55 |
=52.
看了 计算(1)3.75×4.8+...的网友还看了以下:
方括号代表根号(1)[12]+3[4/3]-2/3[48]-[16/3](2)先化简,再求值:(x 2020-04-27 …
0,π/6,π/4,π/3,π/3,π/2,2/3π,3/4π,5/6π,π,7/6π的正弦余弦值 2020-06-06 …
1×2=1/3(1×2×3-0×1×2)2×3=1/3(2×3×4-1×2×3)3×4=1/3(3 2020-07-19 …
—能简算的要简算(写过程)101*3/4-3/467*7/66(4/5加1/6)*605/17*7 2020-07-19 …
算的过程也要写下来,不要直接写答案(8.)5/x=4/3x1(9)x+3/4=x/5(10)10x 2020-07-21 …
利用数学归纳法证明:1*2^1/2*3+2*2^2/3*4+3*2^3/4*5+...+利用数学归 2020-08-01 …
求不等式组的整数值求同时适合不等式1+(x/3)>3-(x-2/2)和不等式1+(3x+3/8)< 2020-08-03 …
巧算数学快1、2/1+2×3/2+2×3×4/3+2×3×4×5/4+2×3×4×5×6/51、2/ 2020-11-15 …
六年级分数速算与巧算有3道题望大虾们能帮帮ME(简算!!急!!)0.375*(7/9+14/51)+ 2020-12-09 …
5道简便运算题能简便的就简便计算要有算式与题目(1)(3/4÷3/5+1/4)×6/13(2)35÷ 2021-01-02 …