问题 解答题
细心计算
6.3×
3
4
+3.7÷
4
3

(4.5×1.1×4.8)÷(3.3×0.8×0.5)
7÷(7-7×0÷7+7÷7);
18×45(
5
6
+
1
5
).
答案

6.3×

3
4
+3.7÷
4
3

=(6.3+3.7)×0.75

=10×0.75

=7.5;

(4.5×1.1×4.8)÷(3.3×0.8×0.5)

=23.76÷1.32

=18;

7÷(7-7×0÷7+7÷7)

=7÷(7-0+1)

=7÷8

=0.875;

18×45×(

5
6
+
1
5

=18×45×

5
6
+18×45×
1
5

=675+162

=837.

解答题
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