
脱式计算(能简算的要简算) (1)10.2×43 (2)3.64÷4+4.36×25% (3
脱式计算(能简算的要简算)(1)10.2×43(2)3.64÷4+4.36×25%(3)[56-(25+13)]×57....
脱式计算(能简算的要简算) (1)10.2×43 (2)3.64÷4+4.36×25% (3)[56-(25+13)]×57.
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(1)10.2×43,
=(10+0.2)×43,
=10×43+0.2×43,
=430+8.6
=438.6;
(2)3.64÷4+4.36×25%,
=3.64×
+4.36×
,
=(3.64+4.36)×
,
=8×
,
=2;
(3)[
-(
+
)]×
,
=[
-
]×
,
=
×
,
=
.
=(10+0.2)×43,
=10×43+0.2×43,
=430+8.6
=438.6;
(2)3.64÷4+4.36×25%,
=3.64×
1 |
4 |
1 |
4 |
=(3.64+4.36)×
1 |
4 |
=8×
1 |
4 |
=2;
(3)[
5 |
6 |
2 |
5 |
1 |
3 |
5 |
7 |
=[
5 |
6 |
11 |
15 |
5 |
7 |
=
1 |
10 |
5 |
7 |
=
1 |
14 |
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