早教吧作业答案频道 -->数学-->
计算(1)(+41)+(-75);(2)(-16)-(+56);(3)0-(-10)+4-(-15);(4)492425×(-5);(5)(-458)+(-3.75)+(-238)+(-314);(6)(-15)÷(-1.25)×(-312);(7)(-7.5)×(-1119
题目详情
计算
(1)(+41)+(-75);
(2)(-
)-(+
);
(3)0-(-10)+4-(-15);
(4)49
×(-5);
(5)(-4
)+(-3.75)+(-2
)+(-3
);
(6)(-15)÷(-1.25)×(-3
);
(7)(-7.5)×(-11
)+(-7.5)×1
-(-7.5)×6;
(8)23×(-5)-(-9)÷
;
(9)[30+(
+
-
)×(-36)]÷(-5).
(1)(+41)+(-75);
(2)(-
1 |
6 |
5 |
6 |
(3)0-(-10)+4-(-15);
(4)49
24 |
25 |
(5)(-4
5 |
8 |
3 |
8 |
1 |
4 |
(6)(-15)÷(-1.25)×(-3
1 |
2 |
(7)(-7.5)×(-11
1 |
9 |
1 |
9 |
(8)23×(-5)-(-9)÷
3 |
128 |
(9)[30+(
7 |
9 |
5 |
6 |
11 |
12 |
▼优质解答
答案和解析
(1)(+41)+(-75)=-34
(2)(-
)-(+
)=-1
(3)0-(-10)+4-(-15)
=10+4+15
=29
(4)49
×(-5)
=(50-
)×(-5)
=50×(-5)-
×(-5)
=-250+
=-249
(5)(-4
)+(-3.75)+(-2
)+(-3
)
=(-4
-2
)+(-3.75-3
)
=(-7)+(-7)
=-14
(6)(-15)÷(-1.25)×(-3
)
=12×(-3
)
=-42
(7)(-7.5)×(-11
)+(-7.5)×1
-(-7.5)×6
=(-7.5)×(-11
+1
-6)
=(-7.5)×(-16)
=120
(8)23×(-5)-(-9)÷
=(-115)+384
=269
(9)[30+(
+
-
)×(-36)]÷(-5)
=[30+
×(-36)+
×(-36)-
×(-36)]÷(-5)
=[30-28-30+33]÷(-5)
=5÷(-5)
=-1
(2)(-
1 |
6 |
5 |
6 |
(3)0-(-10)+4-(-15)
=10+4+15
=29
(4)49
24 |
25 |
=(50-
1 |
25 |
=50×(-5)-
1 |
25 |
=-250+
1 |
5 |
=-249
4 |
5 |
(5)(-4
5 |
8 |
3 |
8 |
1 |
4 |
=(-4
5 |
8 |
3 |
8 |
1 |
4 |
=(-7)+(-7)
=-14
(6)(-15)÷(-1.25)×(-3
1 |
2 |
=12×(-3
1 |
2 |
=-42
(7)(-7.5)×(-11
1 |
9 |
1 |
9 |
=(-7.5)×(-11
1 |
9 |
1 |
9 |
=(-7.5)×(-16)
=120
(8)23×(-5)-(-9)÷
3 |
128 |
=(-115)+384
=269
(9)[30+(
7 |
9 |
5 |
6 |
11 |
12 |
=[30+
7 |
9 |
5 |
6 |
11 |
12 |
=[30-28-30+33]÷(-5)
=5÷(-5)
=-1
看了 计算(1)(+41)+(-7...的网友还看了以下:
发现什么规律?1+1=1×11+3=4=2×21+3+5=9=3×31+3+5+7=16=4×41 2020-04-09 …
能简便运算的用简便方法算4.4×4.6+5.4×4.41÷[0.1÷(1.43-0.93)]12. 2020-05-15 …
一定要拆数,1.3又5分之3×25又5分之2+37.5×6又5分之22.6.8×16.8+19.3 2020-07-18 …
估算98×4≈52×2≈83×7≈206×7≈697×9≈238×3≈6299×5≈5809×4≈ 2020-07-18 …
lingo中的error12报错,为什么,程序如下model:sets:WH/W1..W6/:AL; 2020-10-31 …
这种九宫格怎么填,8**9**6**\x05\x05*6**7**8*\x05**2**8**41* 2020-10-31 …
口算我最棒350÷7=300×40=4.7+1.2=8.5-3.9=900÷9=77÷7=240×3 2020-11-24 …
口算我最棒350÷7=300×40=4.7+1.2=8.5-3.9=900÷9=77÷7=240×3 2020-11-24 …
口算我最棒.4.5+3.2=4.7+1.2=8.5-3.9=6.3-2.8=900÷9=77÷7=3 2020-11-24 …
找规律练习题1=1*11+3=4=2*21+3+5=9=3*31+3+5+7=16=4*41+3+5 2021-01-21 …