脱式计算,能简算的要简算.①(35+13)÷75+14②29+5.28+79+4.72③85.7×16+14.3×16④2+48%÷

2024-11-23 15:33:37
推荐回答(1个)
回答1:


①(

3
5
+
1
3
)÷
7
5
+
1
4

=
14
15
÷
7
5
+
1
4

=
2
3
+
1
4

=
11
12


2
9
+5.28+
7
9
+4.72,
=(
2
9
+
7
9
)+(5.28+4.72),
=1+10,
=11;

③85.7×16+14.3×16,
=(85.7+14.3)×16,
=100×16,
=1600;

④2+48%÷0.6-
3
4

=2+0.8-
3
4

=2.8-0.75,
=2.05.