脱式计算(怎样简便怎样算):43-(25+24÷223 );(310×0.87+0.23×310)÷3%;32×3031+131;3.59-1.
脱式计算(怎样简便怎样算):43-(25+24÷223);(310×0.87+0.23×310)÷3%;32×3031+131;3.59-1.81-0.19-0.59....
脱式计算(怎样简便怎样算):43-(25+24÷223 );(310×0.87+0.23×310)÷3%;32×3031+131;3.59-1.81-0.19-0.59.
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(1)43-(
+24÷2
),
=43-(
+24÷
),
=43-(
+24×
),
=43-
-9,
=43-9-
,
=34-
,
=33
;
(2)(
×0.87+0.23×
)÷3%,
=
×(0.87+0.23)÷
,
=
×1.1×
,
=
×
×1.1,
=10×1.1,
=11;
(3)32×
+
,
=(31+1)×
+
,
=31×
+
+
,
=30+1,
=31;
(4)3.59-1.81-0.19-0.59,
=(3.59-0.59)-(1.81+0.19),
=3-2,
=1.
2 |
5 |
2 |
3 |
=43-(
2 |
5 |
8 |
3 |
=43-(
2 |
5 |
3 |
8 |
=43-
2 |
5 |
=43-9-
2 |
5 |
=34-
2 |
5 |
=33
3 |
5 |
(2)(
3 |
10 |
3 |
10 |
=
3 |
10 |
3 |
100 |
=
3 |
10 |
100 |
3 |
=
3 |
10 |
100 |
3 |
=10×1.1,
=11;
(3)32×
30 |
31 |
1 |
31 |
=(31+1)×
30 |
31 |
1 |
31 |
=31×
30 |
31 |
30 |
31 |
1 |
31 |
=30+1,
=31;
(4)3.59-1.81-0.19-0.59,
=(3.59-0.59)-(1.81+0.19),
=3-2,
=1.
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