题目内容

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
).
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.
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