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脱式计算:-10+8÷(-2)2-(-4)×3=314+(-235)+534+(-825)=100×(0.7-310-425+0.03)=-49+2×(-3)2+(-6)÷(-19)=

题目详情
脱式计算:
-10+8÷(-2)2-(-4)×3=

3
1
4
+(-2
3
5
)+5
3
4
+(-8
2
5
)=
100×(0.7-
3
10
-
4
25
+0.03)=
-49+2×(-3)2+(-6)÷(-
1
9
)=
▼优质解答
答案和解析
(1)-10+8÷(-2)2-(-4)×3
=-10+8÷4-(-12),
=-10+2+12,
=4;

(2)3
1
4
+(-2
3
5
)+5
3
4
+(-8
2
5

=3
1
4
-2
3
5
+5
3
4
-8
2
5

=(3
1
4
+5
3
4
)-(2
3
5
+8
2
5
),
=9-11,
=-2;

(3)100×(0.7-
3
10
-
4
25
+0.03)
=100×(0.7-0.3-0.16+0.03),
=100×0.27,
=27;

(4)-49+2×(-3)2+(-6)÷(-
1
9

=-49+2×9+54,
=-49+18+54,
=23.