问题
解答题
用简便方法计算.
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答案
(1)25×24,
=25×4×6,
=100×6,
=600;
(2)(27×5)×2,
=27×(5×2),
=27×10,
=270;
(3)263+65+35+337,
=263+337+(65+35),
=600+100,
=700;
(4)800÷25,
=8×100÷25,
=8×(100÷25),
=8×4,
=32.
用简便方法计算.
|
(1)25×24,
=25×4×6,
=100×6,
=600;
(2)(27×5)×2,
=27×(5×2),
=27×10,
=270;
(3)263+65+35+337,
=263+337+(65+35),
=600+100,
=700;
(4)800÷25,
=8×100÷25,
=8×(100÷25),
=8×4,
=32.