1樓:貓九尾
①1379+450÷18×40
=1379+25×40,
=1379+1000,
=2379;
②(5+0.4×0.25)÷1.5
=(5+0.1)÷1.5,
=5.1÷1.5,
=3.4;③27
×14+57
÷4 =27
×14+57
×14,=(27+5
7)×14,
=1×14,
=14;④35÷[7
8×(1-27)]
=35÷(78×5
7),=35÷58,
=56.
計算下面各題,怎樣簡便就怎樣計算,要寫出必要的計算過程.①44×25②6200÷25÷4③65×5-35÷5④362-(
2樓:尉遲俟兜
①44×25,
=11×4×25,
=11×(4×25),
=11×100,
=1100;
②6200÷25÷4,
=6200÷(25×4),
=6200÷100,
=62;
③65×5-35÷5,
=325-7,
=318;
④362-(16+27)×4,
=362-43×4,
=362-172,
=190;
⑤51.27-8.66-1.34,
=51.27-(8.66+1.34),
=51.27-10,
=41.27;
⑥75+12.7+25+6.3,
=(75+25)+(12.7+6.3),
=100+19,
=119.
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