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用你喜欢的方法进行计算.78-4.5+22-451211×11×11-11×11-1014×(4.85÷518-3.6+6.15×335)
题目详情
用你喜欢的方法进行计算.
78-4.5+22-45
11×11×11-11×11-10
×(4.85÷
-3.6+6.15×3
)
78-4.5+22-45
1 |
2 |
11×11×11-11×11-10
1 |
4 |
5 |
18 |
3 |
5 |
▼优质解答
答案和解析
(1)78-4.5+22-45
=78-4.5+22-45.5
=(78+22)-(4.5+45.5)
=100-50
=50
(2)11×11×11-11×11-10
=11×11×(11-1)-10
=11×11×10-10
=10×(11×11-1)
=10×(121-1)
=10×120
=1200
(3)
×(4.85÷
-3.6+6.15×3
)
=
×(4.85×3.6-3.6+6.15×3.6)
=
×3.6×(4.85-1+6.15)
=0.9×10
=9
1 |
2 |
=78-4.5+22-45.5
=(78+22)-(4.5+45.5)
=100-50
=50
(2)11×11×11-11×11-10
=11×11×(11-1)-10
=11×11×10-10
=10×(11×11-1)
=10×(121-1)
=10×120
=1200
(3)
1 |
4 |
5 |
18 |
3 |
5 |
=
1 |
4 |
=
1 |
4 |
=0.9×10
=9
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