题目内容
怎样算简便就怎样算
| 425÷(155-130) | (765-230)×45 | 109+127+73 |
| 608-154-146 | 165-97 | 258+98. |
(1)425÷(155-130),
=425÷25,
=17;
(2)(765-230)×45,
=535×45,
=24075;
(3)109+127+73,
=109+(127+73),
=109+200,
=309;
(4)608-154-146,
=608-(154+146),
=608-300,
=308;
(5)165-97,
=165-(100-3),
=165-100+3,
=65+3,
=68;
(6)258+98,
=258+(100-2),
=258+100-2,
=358-2,
=356.
=425÷25,
=17;
(2)(765-230)×45,
=535×45,
=24075;
(3)109+127+73,
=109+(127+73),
=109+200,
=309;
(4)608-154-146,
=608-(154+146),
=608-300,
=308;
(5)165-97,
=165-(100-3),
=165-100+3,
=65+3,
=68;
(6)258+98,
=258+(100-2),
=258+100-2,
=358-2,
=356.
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