
用递等式计算(能简算的要简算).(1)(12+15)÷(0.5-0.2)(2)18÷[5.2÷(65-23+13)]÷27(3)(
用递等式计算(能简算的要简算).(1)(12+15)÷(0.5-0.2)(2)18÷[5.2÷(65-23+13)]÷27(3)(34-112-124)÷148(4)(9...
用递等式计算(能简算的要简算).(1)(12+15)÷(0.5-0.2)(2)18÷[5.2÷(65-23+13)]÷27(3)(34-112-124)÷148(4)(999×1.01+9.9×99.9)÷5×16.
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(1)(
1 |
2 |
1 |
5 |
=0.7÷0.3,
=
7 |
3 |
(2)18÷[5.2÷(
6 |
5 |
2 |
3 |
1 |
3 |
2 |
7 |
=18÷[5.2÷(
8 |
15 |
1 |
3 |
2 |
7 |
=18÷[5.2÷
13 |
15 |
2 |
7 |
=18÷6÷
2 |
7 |
=3÷
2 |
7 |
=10.5;
(3)(
3 |
4 |
1 |
12 |
1 |
24 |
1 |
48 |
=(
3 |
4 |
1 |
12 |
1 |
24 |
=
3 |
4 |
1 |
12 |
1 |
24 |
=36-4-2,
=30;
(4)(999×1.01+9.9×99.9)÷5×
1 |
6 |
=(99.9×10.1+9.9×99.9)÷5×
1 |
6 |
=99.9×(10.1+9.9)÷5×
1 |
6 |
=99.9×20÷5×
1 |
6 |
=1998÷5×
1 |
6 |
=399.6×