
用递等式计算,能简算的要简算(1)1117÷4+14×617 (2)46.2-15.03-4.97(3)(4...
用递等式计算,能简算的要简算(1)1117÷4+14×617(2)46.2-15.03-4.97(3)(4.5-0.65×2)÷0.5(4)1320÷[12×(34+65...
用递等式计算,能简算的要简算(1)1117÷4+14×617 (2)46.2-15.03-4.97(3)(4.5-0.65×2)÷0.5 (4)1320÷[12×(34+65)].
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(1)
÷4+
×
=
×
+
×
=(
+
)×
=1×
=
(2)46.2-15.03-4.97
=46.2-(15.03+4.97)
=46.2-20
=26.2
(3)(4.5-0.65×2)÷0.5
=(4.5-1.3)÷0.5
=3.2÷0.5
=6.4
(4)
÷[
×(
+
)]
=
÷[
×
]
=
÷
=
×
=
11 |
17 |
1 |
4 |
6 |
17 |
=
11 |
17 |
1 |
4 |
1 |
4 |
6 |
17 |
=(
11 |
17 |
6 |
17 |
1 |
4 |
=1×
1 |
4 |
=
1 |
4 |
(2)46.2-15.03-4.97
=46.2-(15.03+4.97)
=46.2-20
=26.2
(3)(4.5-0.65×2)÷0.5
=(4.5-1.3)÷0.5
=3.2÷0.5
=6.4
(4)
13 |
20 |
1 |
2 |
3 |
4 |
6 |
5 |
=
13 |
20 |
1 |
2 |
39 |
20 |
=
13 |
20 |
39 |
40 |
=
13 |
20 |
40 |
39 |
=
2 |
3 |
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