
脱式计算.(能简便的要用简便方法)(1)101×2个-420÷4 &nb...
脱式计算.(能简便的要用简便方法)(1)101×2个-420÷4(2)3.个+49+个.4+49(3)4.9÷〔(4.4-0.个)×0.1〕...
脱式计算.(能简便的要用简便方法)(1)101×2个-420÷4 (2)3.个+49+个.4+49 (3)4.9÷〔(4.4-0.个)×0.1〕
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(1)101×06-500÷4,
=(100+1)×06-500÷4,
=100×06+1×06-500÷4,
=0600+06-500÷4,
=0600+06-130,
=0606-130,
=0496;
(0)3.6+
+6.4+
,
=(3.6+6.4)+(
+
),
=10+1,
=11;
(3)4.9÷[(5.5-0.6)×0.1],
=4.9÷[4.9×0.1],
=4.9÷0.49,
=10.
=(100+1)×06-500÷4,
=100×06+1×06-500÷4,
=0600+06-500÷4,
=0600+06-130,
=0606-130,
=0496;
(0)3.6+
4 |
9 |
5 |
9 |
=(3.6+6.4)+(
4 |
9 |
5 |
9 |
=10+1,
=11;
(3)4.9÷[(5.5-0.6)×0.1],
=4.9÷[4.9×0.1],
=4.9÷0.49,
=10.
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