脱式计算.(能简算的要简算,并写出主要的简便过程)(1)3.58-2.36-(2.64-1.42)(2)(14+16?13)×12
脱式计算.(能简算的要简算,并写出主要的简便过程)(1)3.58-2.36-(2.64-1.42)(2)(14+16?13)×12(3)3.6×118+8.4÷811(4...
脱式计算.(能简算的要简算,并写出主要的简便过程)(1)3.58-2.36-(2.64-1.42)(2)(14+16?13)×12(3)3.6×118+8.4÷811(4)34÷[3.75×(1.2?15)].
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(1)3.58-2.36-(2.64-1.42)
=3.58-2.36-2.64+1.42
=(3.58+1.42)-(2.36+2.64)
=5-5
=0;
(2)(
+
?
)×12
=
×12+
×12-
×12
=3+2-4
=1;
(3)3.6×
+8.4÷
=3.6×
+8.4×
=(3.6+8.4)×
=12×
=
;
(4)
÷[3.75×(1.2?
)]
=
÷[3.75×1]
=
÷3
=
.
=3.58-2.36-2.64+1.42
=(3.58+1.42)-(2.36+2.64)
=5-5
=0;
(2)(
1 |
4 |
1 |
6 |
1 |
3 |
=
1 |
4 |
1 |
6 |
1 |
3 |
=3+2-4
=1;
(3)3.6×
11 |
8 |
8 |
11 |
=3.6×
11 |
8 |
11 |
8 |
=(3.6+8.4)×
11 |
8 |
=12×
11 |
8 |
=
33 |
2 |
(4)
3 |
4 |
1 |
5 |
=
3 |
4 |
=
3 |
4 |
3 |
4 |
=
1 |
5 |
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